diff --git a/code/golang/internal/core/logging/logging.go b/code/golang/internal/core/logging/logging.go
index f34b9ef..030b606 100644
--- a/code/golang/internal/core/logging/logging.go
+++ b/code/golang/internal/core/logging/logging.go
@@ -5,10 +5,15 @@ package logging
  * ---------------------------------------------------------------- */
 
 import (
+	"bufio"
 	"fmt"
+	"io"
 	"os"
 
+	"github.com/buger/goterm"
+
 	"ads/internal/core/utils"
+	"ads/pkg/re"
 )
 
 /* ---------------------------------------------------------------- *
@@ -59,10 +64,10 @@ func SetTagAll(mode bool) {
 }
 
 /* ---------------------------------------------------------------- *
- * METHOD logging
+ * METHODS logging
  * ---------------------------------------------------------------- */
 
-func logGeneric(tag string, lines ...interface{}) {
+func logGeneric(pipe *os.File, tag string, lines ...interface{}) {
 	if !force && quietmode {
 		return
 	}
@@ -74,7 +79,7 @@ func logGeneric(tag string, lines ...interface{}) {
 		if !ansimode {
 			_line = utils.StripAnsi(_line)
 		}
-		fmt.Println(_line)
+		fmt.Fprintln(pipe, _line)
 		if !tagAll {
 			tag = ""
 		}
@@ -83,12 +88,12 @@ func logGeneric(tag string, lines ...interface{}) {
 
 func LogPlain(lines ...interface{}) {
 	SetTagAll(false)
-	logGeneric("", lines...)
+	logGeneric(os.Stdout, "", lines...)
 }
 
 func LogInfo(lines ...interface{}) {
 	SetTagAll(true)
-	logGeneric("[\033[94;1mINFO\033[0m]", lines...)
+	logGeneric(os.Stdout, "[\033[94;1mINFO\033[0m]", lines...)
 }
 
 func LogDebug(lines ...interface{}) {
@@ -96,21 +101,59 @@ func LogDebug(lines ...interface{}) {
 		return
 	}
 	SetTagAll(true)
-	logGeneric("[\033[96;1mDEBUG\033[0m]", lines...)
+	logGeneric(os.Stdout, "[\033[96;1mDEBUG\033[0m]", lines...)
 }
 
 func LogWarn(lines ...interface{}) {
 	SetTagAll(false)
-	logGeneric("[\033[93;1mWARNING\033[0m]", lines...)
+	logGeneric(os.Stdout, "[\033[93;1mWARNING\033[0m]", lines...)
 }
 
 func LogError(lines ...interface{}) {
 	SetTagAll(false)
-	logGeneric("[\033[91;1mERROR\033[0m]", lines...)
+	logGeneric(os.Stderr, "[\033[91;1mERROR\033[0m]", lines...)
 }
 
 func LogFatal(lines ...interface{}) {
 	SetTagAll(false)
-	logGeneric("[\033[91;1mFATAL\033[0m]", lines...)
+	logGeneric(os.Stderr, "[\033[91;1mFATAL\033[0m]", lines...)
 	os.Exit(1)
 }
+
+/* ---------------------------------------------------------------- *
+ * METHOD prompt
+ * ---------------------------------------------------------------- */
+
+// Zeigt Prompt an und liest Usereingabe aus, erkennt auch ob Meta+D geklickt wurde
+func Prompt(lines ...interface{}) (string, bool, error) {
+	pipe := os.Stdout
+	if len(lines) > 0 {
+		logGeneric(pipe, "", lines...)
+		logGeneric(pipe, "", "")
+	}
+	fmt.Fprint(pipe, "$ ")
+	reader := bufio.NewReader(os.Stdin)
+	line, err := reader.ReadString('\n')
+	line = re.Sub(`\s+$`, "", line)
+	if err != nil && err == io.EOF {
+		fmt.Fprintln(pipe, "")
+		return line, true, err
+	}
+	return line, false, err
+}
+
+func PromptAnyKeyToContinue() bool {
+	pipe := os.Stdout
+	fmt.Fprint(pipe, "\033[2;3mEingabetaste (Enter) zum Fortsetzen drücken:\033[0m ")
+	_, exit, _ := Prompt()
+	return exit
+}
+
+/* ---------------------------------------------------------------- *
+ * METHODS terminal
+ * ---------------------------------------------------------------- */
+
+func ClearScreen() {
+	goterm.Clear()
+	goterm.Flush()
+}
diff --git a/code/golang/internal/endpoints/endpoints_it.go b/code/golang/internal/endpoints/endpoints_it.go
new file mode 100644
index 0000000..9c3f95a
--- /dev/null
+++ b/code/golang/internal/endpoints/endpoints_it.go
@@ -0,0 +1,108 @@
+package endpoints
+
+/* ---------------------------------------------------------------- *
+ * IMPORTS
+ * ---------------------------------------------------------------- */
+
+import (
+	"ads/internal/core/logging"
+	"ads/internal/menus"
+	"ads/internal/setup"
+	"reflect"
+
+	// algorithm_search_binary "ads/internal/algorithms/search/binary"
+	// algorithm_search_interpol "ads/internal/algorithms/search/interpol"
+	// algorithm_search_ith_element "ads/internal/algorithms/search/ith_element"
+	// algorithm_search_jump "ads/internal/algorithms/search/jump"
+	// algorithm_search_poison "ads/internal/algorithms/search/poison"
+	algorithm_search_sequential "ads/internal/algorithms/search/sequential"
+	// algorithm_sum_maxsubsum "ads/internal/algorithms/sum/maxsubsum"
+)
+
+/* ---------------------------------------------------------------- *
+ * ENDPOINT run interactive modus
+ * ---------------------------------------------------------------- */
+
+// Startet App im interaktiven Modus
+func RunInteractive() error {
+	logging.LogPlain(setup.Logo())
+	_, err := menuMain.ShowMenu()
+	logging.LogInfo("Programm terminiert.")
+	return err
+}
+
+/* ---------------------------------------------------------------- *
+ * MENUS
+ * ---------------------------------------------------------------- */
+
+var menuMain = menus.Menu{
+	IsRoot: true,
+	Path:   []string{"Hauptmenü"},
+	PromptMessages: []string{
+		"Option wählen",
+	},
+	Options: []menus.MenuOption{
+		{Label: "Version des Programms anzeigen", Action: actionShowVersion},
+		{Label: "Suchalgorithmen", Submenu: &menuSearchAlgorithms},
+		{Label: "Summenalgorithmen", Submenu: &menuSumAlgorithms},
+	},
+	DefaultOption: -1,
+}
+
+var menuSearchAlgorithms = menus.Menu{
+	IsRoot: false,
+	Path:   []string{"Hauptmenü", "Suchalgorithmus"},
+	PromptMessages: []string{
+		"Algorithmus wählen",
+	},
+	Options: []menus.MenuOption{
+		{Label: "Binärsuchalgorithmus"},
+		{Label: "Interpolationsalgorithmus"},
+		{Label: "Suche i. kleinstes Element"},
+		{Label: "Suche i. kleinstes Element", SubLabel: "D & C"},
+		{Label: "Sprungsuche", SubLabel: "linear"},
+		{Label: "Sprungsuche", SubLabel: "exponentiell"},
+		{Label: "Giftsuche"},
+		{Label: "Giftsuche", SubLabel: "optimiert"},
+		{Label: "Sequentiellsuchalgorithmus", Action: actionAlgorithmSearchSequential},
+	},
+	DefaultOption: -1,
+}
+
+var menuSumAlgorithms = menus.Menu{
+	IsRoot: false,
+	Path:   []string{"Hauptmenü", "Suchalgorithmus"},
+	PromptMessages: []string{
+		"Algorithmus wählen",
+	},
+	Options: []menus.MenuOption{
+		{Label: "Maximale Teilsumme", SubLabel: "brute force"},
+		{Label: "Maximale Teilsumme", SubLabel: "D & C"},
+	},
+	DefaultOption: -1,
+}
+
+/* ---------------------------------------------------------------- *
+ * ACTIONS - basic
+ * ---------------------------------------------------------------- */
+
+func actionShowVersion() error {
+	logging.LogInfo("Version des Programms")
+	Version()
+	return nil
+}
+
+/* ---------------------------------------------------------------- *
+ * ACTIONS - Algorithmen
+ * ---------------------------------------------------------------- */
+
+// TODO
+func actionAlgorithmSearchSequential() error {
+	input_L := []int{45, 67}
+	input_x := 6
+	menus.PromptValue("L", "Liste von Integers", "z.B. \033[1m5 73 42\033[0m", reflect.TypeOf([]int{}))
+	setup.DisplayStartOfCaseBlank()
+	algorithm_search_sequential.FancySequentialSearch(input_L, input_x)
+	setup.DisplayEndOfCase()
+	return nil
+}
diff --git a/code/golang/internal/endpoints/endpoints_run.go b/code/golang/internal/endpoints/endpoints_run.go
index b8ed601..b121501 100644
--- a/code/golang/internal/endpoints/endpoints_run.go
+++ b/code/golang/internal/endpoints/endpoints_run.go
@@ -20,11 +20,11 @@ import (
 )
 
 /* ---------------------------------------------------------------- *
- * ENDPOINT run
+ * ENDPOINT run non-interactive modus
  * ---------------------------------------------------------------- */
 
 // Liest Config Datei ein und führt Algorithmen auf Fälle durch
-func Run(path string) error {
+func RunNoninteractive(path string) error {
 	var err error
 	var err_case error
 
@@ -38,7 +38,7 @@ func Run(path string) error {
 	}
 
 	// Fälle extrahieren
-	cases := []types.CaseConfig{}
+	cases := []types.UserConfigCase{}
 	if config.Parts != nil && config.Parts.Cases != nil {
 		cases = *config.Parts.Cases
 	}
@@ -46,7 +46,7 @@ func Run(path string) error {
 		err_case = nil
 		problem := cases[i]
 		setup.DisplayStartOfCase(i, problem.Description)
-		inputs := types.InputsConfig{}
+		inputs := types.UserConfigInputs{}
 		if problem.Inputs != nil {
 			inputs = *problem.Inputs
 		}
diff --git a/code/golang/internal/menus/menus.go b/code/golang/internal/menus/menus.go
new file mode 100644
index 0000000..f94ed85
--- /dev/null
+++ b/code/golang/internal/menus/menus.go
@@ -0,0 +1,102 @@
+package menus
+
+/* ---------------------------------------------------------------- *
+ * IMPORTS
+ * ---------------------------------------------------------------- */
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"ads/internal/core/logging"
+)
+
+/* ---------------------------------------------------------------- *
+ * METHOD show menu
+ * ---------------------------------------------------------------- */
+
+func (menu Menu) ShowMenu() (bool, error) {
+	var (
+		choice string
+		index  int
+		meta   bool
+		quit   bool
+	)
+	var promptMessages []string
+	var options [][2]string
+	var defaultOption string
+	var breaks []int
+
+	// Headline einfügen
+	promptMessages = make([]string, len(menu.PromptMessages))
+	copy(promptMessages, menu.PromptMessages)
+	head := fmt.Sprintf("\033[2m%s\033[0m", strings.Join(menu.Path, " > "))
+	promptMessages = append([]string{head}, promptMessages...)
+
+	// Zurück-Option einfügen
+	defaultOption = fmt.Sprintf("%v", menu.DefaultOption)
+	options = []([2]string){}
+	for i, opt := range menu.Options {
+		key := fmt.Sprintf("%v", i+1)
+		subLabel := opt.SubLabel
+		label := opt.Label
+		if !(subLabel == "") {
+			label = fmt.Sprintf("%v (\033[2m%v\033[0m)", opt.Label, subLabel)
+		}
+		options = append(options, [2]string{key, label})
+	}
+	breaks = []int{len(menu.Options) - 1}
+	if !menu.IsRoot {
+		options = append(options, [2]string{"z", "Zurück zum vorherigen Menü"})
+	}
+	options = append(options, [2]string{"q", "Programm schließen"})
+
+	// User Response immer abfragen und abarbeiten, bis quit/return.
+	performClearScreen := !menu.IsRoot
+	for {
+		if performClearScreen {
+			logging.ClearScreen()
+		}
+		performClearScreen = true
+
+		choice, meta = PromptListOfOptions(promptMessages, options, breaks, defaultOption)
+
+		// Falls quit wählt, -> quit:
+		if (menu.IsRoot && meta) || choice == "q" {
+			return true, nil
+		}
+
+		// Falls User back wählt, -> return:
+		if (!menu.IsRoot && meta) || choice == "z" {
+			return false, nil
+		}
+
+		// sonst führe die assoziierte Methode aus
+		index64, _ := strconv.ParseInt(choice, 10, 64)
+		index = int(index64) - 1
+		if 0 <= index && index < len(menu.Options) {
+			opt := menu.Options[index]
+			// Entweder Untermenü öffnen oder Action ausführen
+			if opt.Submenu != nil {
+				quit, _ = opt.Submenu.ShowMenu()
+				if quit {
+					return true, nil
+				}
+			} else if opt.Action != nil {
+				opt.Action()
+				quit := logging.PromptAnyKeyToContinue()
+				// Falls während der Action der User Meta+D klickt, -> quit:
+				if quit {
+					return true, nil
+				}
+			} else {
+				logging.LogWarn("Option noch nicht implementiert.")
+				quit := logging.PromptAnyKeyToContinue()
+				if quit {
+					return true, nil
+				}
+			}
+		}
+	}
+}
diff --git a/code/golang/internal/menus/menus_prompt.go b/code/golang/internal/menus/menus_prompt.go
new file mode 100644
index 0000000..16188e7
--- /dev/null
+++ b/code/golang/internal/menus/menus_prompt.go
@@ -0,0 +1,91 @@
+package menus
+
+/* ---------------------------------------------------------------- *
+ * IMPORTS
+ * ---------------------------------------------------------------- */
+
+import (
+	"fmt"
+	"reflect"
+
+	"ads/internal/core/logging"
+	"ads/internal/core/utils"
+)
+
+/* ---------------------------------------------------------------- *
+ * METHOD prompt options
+ * ---------------------------------------------------------------- */
+
+// Zeigt Prompt mit Liste von Optionen an
+func PromptListOfOptions(messages []string, options [][2]string, breaks []int, defaultChoice string) (string, bool) {
+	var n = len(options)
+	var (
+		choice string
+		cancel bool
+		err    error
+	)
+	var lines []interface{}
+	var optionsMap = map[string]string{}
+
+	// Erzeuge Messages
+	lines = []interface{}{}
+	for _, message := range messages {
+		lines = append(lines, message)
+	}
+	lines = append(lines, "")
+	for i, obj := range options {
+		key := obj[0]
+		label := obj[1]
+		optionsMap[key] = label
+		if key == defaultChoice {
+			lines = append(lines, fmt.Sprintf("\033[91m*\033[0m\033[93;1m%v)\033[0m %v", key, label))
+		} else {
+			lines = append(lines, fmt.Sprintf(" \033[93;1m%v)\033[0m %v", key, label))
+		}
+		if i < n-1 && utils.ArrayContains(breaks, i) {
+			lines = append(lines, " \033[93m--------\033[0m")
+		}
+		i++
+	}
+	if !(defaultChoice == "" || defaultChoice == "-1") {
+		lines = append(lines, "")
+		lines = append(lines, "\033[91;2m*\033[0m\033[2m = Default\033[0m")
+	}
+
+	// Wiederhole Prompt, bis gültige Eingabe erreicht
+	for {
+		choice, cancel, err = logging.Prompt(lines...)
+		if cancel {
+			return "", true
+		}
+		if err != nil {
+			logging.ClearScreen()
+			logging.LogError(err)
+			continue
+		}
+		if choice == "" {
+			choice = defaultChoice
+			break
+		}
+		if _, ok := optionsMap[choice]; !ok {
+			logging.ClearScreen()
+			logging.LogError("Ungültige eingabe")
+			continue
+		}
+		break
+	}
+	return choice, false
+}
+
+/* ---------------------------------------------------------------- *
+ * METHOD prompt values
+ * ---------------------------------------------------------------- */
+
+func PromptValue(varname string, typename string, example string, t reflect.Type) (bool, error) {
+	_, cancel, err := logging.Prompt(
+		fmt.Sprintf("Bitte den Wert von \033[1m%s\033[0m als \033[1m%s\033[0m eingeben.", varname, typename),
+		example,
+	)
+	// TODO: input parsen
+	return cancel, err
+}
diff --git a/code/golang/internal/menus/menus_type.go b/code/golang/internal/menus/menus_type.go
new file mode 100644
index 0000000..0077605
--- /dev/null
+++ b/code/golang/internal/menus/menus_type.go
@@ -0,0 +1,26 @@
+package menus
+
+/* ---------------------------------------------------------------- *
+ * IMPORTS
+ * ---------------------------------------------------------------- */
+
+//
+
+/* ---------------------------------------------------------------- *
+ * TYPES
+ * ---------------------------------------------------------------- */
+
+type MenuOption struct {
+	Label    string
+	SubLabel string
+	Submenu  *Menu
+	Action   func() error // NOTE: in go, this is automatically a pointer type
+}
+
+type Menu struct {
+	IsRoot         bool
+	Path           []string
+	PromptMessages []string
+	Options        []MenuOption
+	DefaultOption  int
+}
diff --git a/code/golang/internal/setup/cli/cli.go b/code/golang/internal/setup/cli/cli.go
index 5851c03..56b847b 100644
--- a/code/golang/internal/setup/cli/cli.go
+++ b/code/golang/internal/setup/cli/cli.go
@@ -60,14 +60,15 @@ func ParseCli(args []string) (*types.CliArguments, error) {
 	var err error
 	Parser = argparse.NewParser("cli parser", "Liest Optionen + Flags von Kommandozeile.")
 	arguments := types.CliArguments{
-		Help:       Parser.NewCommand("help", ""),
-		Version:    Parser.NewCommand("version", "Ruft Endpunkt auf, der die Version anzeigt."),
-		Run:        Parser.NewCommand("run", "Ruft Endpunkt auf, der die Algorithmen laufen lässt."),
-		Quiet:      Parser.Flag("q", "quiet", &optionsQuiet),
-		Debug:      Parser.Flag("", "debug", &optionsDebug),
-		Checks:     Parser.String("", "checks", &optionsChecks),
-		Colour:     Parser.String("", "colour", &optionsColour),
-		ConfigFile: Parser.String("", "config", &optionsConfigFile),
+		ModeHelp:        Parser.NewCommand("help", ""),
+		ModeVersion:     Parser.NewCommand("version", "Ruft Endpunkt auf, der die Version anzeigt."),
+		ModeRun:         Parser.NewCommand("run", "Ruft Endpunkt auf, der die Algorithmen laufen lässt."),
+		ModeInteractive: Parser.NewCommand("it", "Startet die App im interaktiven Modus."),
+		Quiet:           Parser.Flag("q", "quiet", &optionsQuiet),
+		Debug:           Parser.Flag("", "debug", &optionsDebug),
+		Checks:          Parser.String("", "checks", &optionsChecks),
+		Colour:          Parser.String("", "colour", &optionsColour),
+		ConfigFile:      Parser.String("", "config", &optionsConfigFile),
 	}
 	err = Parser.Parse(args)
 	return &arguments, err
diff --git a/code/golang/internal/setup/setup_display.go b/code/golang/internal/setup/setup_display.go
index d9c74be..c788d20 100644
--- a/code/golang/internal/setup/setup_display.go
+++ b/code/golang/internal/setup/setup_display.go
@@ -26,6 +26,11 @@ func DisplayStartOfCase(index int, descr *string) {
 	}
 }
 
+func DisplayStartOfCaseBlank() {
+	DisplayBar(80)
+	return
+}
+
 func DisplayEndOfCase() {
 	DisplayBar(80)
 	return
diff --git a/code/golang/internal/types/types_cli.go b/code/golang/internal/types/types_cli.go
index 595244e..4705d77 100644
--- a/code/golang/internal/types/types_cli.go
+++ b/code/golang/internal/types/types_cli.go
@@ -15,14 +15,15 @@ import (
  * ---------------------------------------------------------------- */
 
 type CliArguments struct {
-	Help       *argparse.Command
-	Version    *argparse.Command
-	Run        *argparse.Command
-	Quiet      *bool
-	Debug      *bool
-	Checks     *string
-	Colour     *string
-	ConfigFile *string
+	ModeHelp        *argparse.Command
+	ModeVersion     *argparse.Command
+	ModeRun         *argparse.Command
+	ModeInteractive *argparse.Command
+	Quiet           *bool
+	Debug           *bool
+	Checks          *string
+	Colour          *string
+	ConfigFile      *string
 }
 
 /* ---------------------------------------------------------------- *
diff --git a/code/golang/internal/types/types_userconfig.go b/code/golang/internal/types/types_userconfig.go
index 9a04e70..a894455 100644
--- a/code/golang/internal/types/types_userconfig.go
+++ b/code/golang/internal/types/types_userconfig.go
@@ -11,26 +11,26 @@ package types
  * ---------------------------------------------------------------- */
 
 type UserConfig struct {
-	Info  *InfoConfig  `yaml:"info"`
-	Parts *PartsConfig `yaml:"parts"`
+	Info  *UserConfigInfo  `yaml:"info"`
+	Parts *UserConfigParts `yaml:"parts"`
 }
 
-type InfoConfig struct {
+type UserConfigInfo struct {
 	Title       *string `yaml:"title"`
 	Description *string `yaml:"description"`
 }
 
-type PartsConfig struct {
-	Cases *([]CaseConfig) `yaml:"cases"`
+type UserConfigParts struct {
+	Cases *([]UserConfigCase) `yaml:"cases"`
 }
 
-type CaseConfig struct {
-	Command     *string       `yaml:"command"`
-	Description *string       `yaml:"description"`
-	Inputs      *InputsConfig `yaml:"inputs"`
+type UserConfigCase struct {
+	Command     *string           `yaml:"command"`
+	Description *string           `yaml:"description"`
+	Inputs      *UserConfigInputs `yaml:"inputs"`
 }
 
-type InputsConfig struct {
+type UserConfigInputs struct {
 	List        *[]int `yaml:"L"`
 	SearchRank  *int   `yaml:"i"`
 	SearchValue *int   `yaml:"x"`
diff --git a/code/golang/main.go b/code/golang/main.go
index b33ebe0..d724dff 100644
--- a/code/golang/main.go
+++ b/code/golang/main.go
@@ -63,10 +63,12 @@ func main() {
 	}
 
 	if err == nil {
-		if arguments.Version.Happened() {
+		if arguments.ModeVersion.Happened() {
 			endpoints.Version()
-		} else if arguments.Run.Happened() {
-			err = endpoints.Run(arguments.GetConfigFile())
+		} else if arguments.ModeRun.Happened() {
+			err = endpoints.RunNoninteractive(arguments.GetConfigFile())
+		} else if arguments.ModeInteractive.Happened() {
+			err = endpoints.RunInteractive()
 		} else { // } else if arguments.Help.Happened() {
 			endpoints.Help()
 		}