diff --git a/README.md b/README.md
index 3bf6fd0..b91f897 100644
--- a/README.md
+++ b/README.md
@@ -2,24 +2,6 @@
 another lisp dialect
 > Also available on https://git.ablecorp.us/azur/bobbylisp
 
-```lisp
-; example/s.blsp
-(fun factorial (x)
-    (if (<= x 1)
-        1
-        (* x (factorial (- x 1)))))
-(do
-    (print (factorial 7)))
-```
-
-Compliation flow:
-```
-Input(file) -> Parser -> Compile(Bytecode) -> Interpret
-  String       SExprs        Bytecode            IO
-                                          |->  Compile
-                                              Assembly(?)
-```
-
 ## Installation
 ```bash
 $ make
diff --git a/install.sh b/install.sh
new file mode 100755
index 0000000..4d8445c
--- /dev/null
+++ b/install.sh
@@ -0,0 +1,92 @@
+#!/bin/bash
+tput sc
+
+function clear_print() {
+    tput rc
+}
+
+function print_menu() {
+	local function_arguments=($@)
+
+	local selected_item="$1"
+	local menu_items=(${function_arguments[@]:1})
+	local menu_size="${#menu_items[@]}"
+
+	for (( i = 0; i < $menu_size; ++i ))
+	do
+		if [ "$i" = "$selected_item" ]
+		then
+			echo "* ${menu_items[i]}"
+		else
+			echo "  ${menu_items[i]}"
+		fi
+	done
+}
+
+function run_menu() {
+	local function_arguments=($@)
+
+	local selected_item="$1"
+	local menu_items=(${function_arguments[@]:1})
+	local menu_size="${#menu_items[@]}"
+	local menu_limit=$((menu_size - 1))
+
+	clear_print
+	print_menu "$selected_item" "${menu_items[@]}"
+	
+	while read -rsn1 input
+	do
+		case "$input"
+		in
+			$'\x1B')
+				read -rsn1 -t 0.1 input
+				if [ "$input" = "[" ] 
+				then
+					read -rsn1 -t 0.1 input
+					case "$input"
+					in
+						A) # Arrow up
+							if [ "$selected_item" -ge 1 ]
+							then
+								selected_item=$((selected_item - 1))
+								clear_print
+								print_menu "$selected_item" "${menu_items[@]}"
+							fi
+							;;
+						B) # Arrow down
+							if [ "$selected_item" -lt "$menu_limit" ]
+							then
+								selected_item=$((selected_item + 1))
+								clear_print
+								print_menu "$selected_item" "${menu_items[@]}"
+							fi
+							;;
+					esac
+				fi
+				read -rsn5 -t 0.1 # stdin flush
+				;;
+			"") # Enter
+				return "$selected_item"
+				;;
+		esac
+	done
+}
+
+selected_item=0
+menu_items=("Install" "Uninstall" "Exit")
+
+run_menu "$selected_item" "${menu_items[@]}"
+menu_result="$?"
+
+case "$menu_result"
+in
+	0)
+		echo "Install selected"
+		;;
+	1)
+		echo "Uninstall selected"
+		;;
+	2)
+		echo "Goodbye"
+		;;
+esac
\ No newline at end of file
diff --git a/trolley/.editorconfig b/trolley/.editorconfig
new file mode 100644
index 0000000..163eb75
--- /dev/null
+++ b/trolley/.editorconfig
@@ -0,0 +1,9 @@
+root = true
+
+[*.cr]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
diff --git a/trolley/.gitignore b/trolley/.gitignore
new file mode 100644
index 0000000..0bb75ea
--- /dev/null
+++ b/trolley/.gitignore
@@ -0,0 +1,5 @@
+/docs/
+/lib/
+/bin/
+/.shards/
+*.dwarf
diff --git a/trolley/shard.yml b/trolley/shard.yml
new file mode 100644
index 0000000..649d4c4
--- /dev/null
+++ b/trolley/shard.yml
@@ -0,0 +1,13 @@
+name: trolley
+version: 0.1.0
+
+authors:
+  - Natapat Samutpong <natapat.samutpong@gmail.com>
+
+targets:
+  trolley:
+    main: src/trolley.cr
+
+crystal: 1.3.2
+
+license: MIT
diff --git a/trolley/spec/spec_helper.cr b/trolley/spec/spec_helper.cr
new file mode 100644
index 0000000..6ea484a
--- /dev/null
+++ b/trolley/spec/spec_helper.cr
@@ -0,0 +1,2 @@
+require "spec"
+require "../src/trolley"
diff --git a/trolley/spec/trolley_spec.cr b/trolley/spec/trolley_spec.cr
new file mode 100644
index 0000000..4497898
--- /dev/null
+++ b/trolley/spec/trolley_spec.cr
@@ -0,0 +1,9 @@
+require "./spec_helper"
+
+describe Trolley do
+  # TODO: Write tests
+
+  it "works" do
+    false.should eq(true)
+  end
+end
diff --git a/trolley/src/trolley.cr b/trolley/src/trolley.cr
new file mode 100644
index 0000000..674d8de
--- /dev/null
+++ b/trolley/src/trolley.cr
@@ -0,0 +1,35 @@
+require "option_parser"
+
+module Trolley
+  VERSION = "0.1.0"
+
+  def self.display_help
+    puts "trolley " + VERSION
+    puts <<-HELP
+      USAGE:
+          trolley [COMMAND] [OPTION]
+
+      COMMANDS:
+          -h, --help        Display this help message
+          -v, --version     Display version
+      HELP
+    exit
+  end
+
+  def self.run
+    OptionParser.parse do |parser|
+      parser.on("-h", "--help") do
+        display_help
+      end
+
+      parser.on("-v", "--version") do
+        puts "trolley " + VERSION
+        exit
+      end
+    end
+  end
+end
+
+begin
+  Trolley.run
+end