diff --git a/Gemfile b/Gemfile
index 6facc41..c9cb579 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,4 +4,3 @@ source "https://rubygems.org"
 
 gem 'tty-prompt'
 gem 'tty-file'
-gem "colorize", "~> 0.8.1"
diff --git a/Gemfile.lock b/Gemfile.lock
index aa8cd92..b525079 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,6 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    colorize (0.8.1)
     diff-lcs (1.5.0)
     pastel (0.8.0)
       tty-color (~> 0.5)
@@ -25,7 +24,6 @@ PLATFORMS
   arm64-darwin-21
 
 DEPENDENCIES
-  colorize (~> 0.8.1)
   tty-file
   tty-prompt
 
diff --git a/aoc-helper-0.1.0.gem b/aoc-helper-0.1.0.gem
new file mode 100644
index 0000000..d6042c4
Binary files /dev/null and b/aoc-helper-0.1.0.gem differ
diff --git a/aoc.gemspec b/aoc.gemspec
new file mode 100644
index 0000000..e3265ca
--- /dev/null
+++ b/aoc.gemspec
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+Gem::Specification.new do |spec|
+  spec.name          = "aoc-helper"
+  spec.platform      = Gem::Platform::RUBY
+  spec.version       = "0.1.0"
+  spec.authors       = ["Guido Schweizer"]
+  spec.email         = ["guido.schweizer@posteo.de"]
+  spec.description   = %q{helps to create basic folders for aoc}
+  spec.summary       = %q{run aoc and follow instructions}
+  spec.homepage      = "https://aoc.sgui.de"
+  spec.license       = "MIT"
+
+  spec.metadata["allowed_push_host"] = "https://rubygems.org"
+  spec.metadata["homepage_uri"] = spec.homepage
+  spec.metadata["source_code_uri"] = "https://github.com/guidocodes/aoc-helper"
+
+  spec.files         = Dir.glob("lib/**/*", File::FNM_DOTMATCH)
+  spec.extra_rdoc_files = ["readme.md", "license.txt"]
+  spec.bindir        = "exe"
+  spec.executables   = ["aoc"]
+  spec.require_paths = ["lib"]
+  spec.required_ruby_version = ">= 3.0.0"
+
+  spec.add_dependency "tty-file", "~> 0.10"
+  spec.add_dependency "tty-prompt", "~> 0.23"
+end
\ No newline at end of file
diff --git a/app/main.rb b/app/main.rb
deleted file mode 100644
index 6e37348..0000000
--- a/app/main.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-require "tty-prompt"
-require_relative "tasks/new_day"
-require_relative "tasks/part_two"
-
-prompt = TTY::Prompt.new
-
-day = prompt.ask("Name the day (1-24)") do |q|
-  q.in("1-24")
-end
-selected = prompt.select("What do you want to do", "New day":0, "Add part 2 to a day":1)
-
-if selected == 0
-  new_day(prompt, day)
-elsif selected == 1
-  part_two(prompt, day)
-end
diff --git a/exe/aoc b/exe/aoc
new file mode 100755
index 0000000..a0a031c
--- /dev/null
+++ b/exe/aoc
@@ -0,0 +1,14 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+lib_path = File.expand_path('../lib', __dir__)
+$:.unshift(lib_path) if !$:.include?(lib_path)
+
+require("aoc")
+
+begin
+  AOC.run
+rescue StandardError => err
+  puts "ERROR: #{err.message}"
+  exit 1 #err.status
+end
\ No newline at end of file
diff --git a/lib/aoc.rb b/lib/aoc.rb
new file mode 100644
index 0000000..4fe363b
--- /dev/null
+++ b/lib/aoc.rb
@@ -0,0 +1,20 @@
+require "tty-prompt"
+require_relative "tasks/new_day"
+require_relative "tasks/part_two"
+
+class AOC
+  def self.run
+    prompt = TTY::Prompt.new
+
+    day = prompt.ask("Name the day (1-24)") do |q|
+      q.in("1-24")
+    end
+    selected = prompt.select("What do you want to do", "New day":0, "Add part 2 to a day":1)
+
+    if selected == 0
+      new_day(prompt, day)
+    elsif selected == 1
+      part_two(prompt, day)
+    end
+  end
+end
diff --git a/app/tasks/new_day.rb b/lib/tasks/new_day.rb
similarity index 67%
rename from app/tasks/new_day.rb
rename to lib/tasks/new_day.rb
index 4037794..337010b 100644
--- a/app/tasks/new_day.rb
+++ b/lib/tasks/new_day.rb
@@ -2,14 +2,20 @@ require "tty-prompt"
 require "tty-file"
 require "ostruct"
 
+require_relative("templates")
+
 def new_day(prompt, day)
   input = prompt.multiline("Example input").join("")
   print input
   result = prompt.ask("Example result")
 
   day_name = "day_#{day}"
-  
-  TTY::File.copy_directory("app/templates","#{day_name}")
+
+  TTY::File.create_dir(day_name)
+  TTY::File.create_file("#{day_name}/data")
+  TTY::File.create_file("#{day_name}/impl.rb", IMPL_RB)
+  TTY::File.create_file("#{day_name}/run.rb", RUN_RB)
+  TTY::File.create_file("#{day_name}/test.rb", TEST_RB)
 
   TTY::File.replace_in_file "#{day_name}/run.rb", /%day_name%/, day_name
   TTY::File.replace_in_file "#{day_name}/test.rb", /%day_name%/, day_name
@@ -18,4 +24,4 @@ def new_day(prompt, day)
 
   puts "Done - run with:"
   puts "ruby #{day_name}/test.rb"
-end
\ No newline at end of file
+end
diff --git a/app/tasks/part_two.rb b/lib/tasks/part_two.rb
similarity index 100%
rename from app/tasks/part_two.rb
rename to lib/tasks/part_two.rb
diff --git a/lib/tasks/templates.rb b/lib/tasks/templates.rb
new file mode 100644
index 0000000..942f9f6
--- /dev/null
+++ b/lib/tasks/templates.rb
@@ -0,0 +1,67 @@
+
+TEST_RB = <<~'TEST'
+require_relative "impl"
+
+INPUT = <<~IN
+%example_input%
+IN
+
+RESULT = %example_result%
+
+def test_example
+  parsed = parse(INPUT)
+  result = calculate(parsed)
+
+  if result == RESULT
+    puts "Test successful. Now run with real input"
+    puts "ruby %day_name%/run.rb"
+  else
+    puts "Test failed"
+    puts "expected \"#{RESULT}\" got \"#{result}\""
+  end
+end
+
+test_example
+TEST
+
+RUN_RB = <<~'RUN'
+require_relative "impl"
+
+def print(result)
+  if result.is_a? Array
+    result.map! {|l| "#{l}\n" } 
+  end
+  
+  puts result
+end
+
+def run
+  puts "running your implementation"
+  input = File.new("%day_name%/data").read
+  data = parse(input)
+  result = calculate(data)
+  print(result)
+end
+
+run
+RUN
+
+IMPL_RB = <<~'IMPL'
+#prepare the input which is a string containing new lines
+def parse(input)
+  data = []
+  input.each_line do |line|
+    data << line
+  end
+  data
+end
+
+# result should a single string or integer
+def calculate(data)
+  result = ""
+  data.each do |d|
+    result = d
+  end
+  result
+end
+IMPL
\ No newline at end of file
diff --git a/license.txt b/license.txt
new file mode 100644
index 0000000..8ab70c0
--- /dev/null
+++ b/license.txt
@@ -0,0 +1 @@
+MIT
\ No newline at end of file
diff --git a/app/templates/data b/templates/data
similarity index 100%
rename from app/templates/data
rename to templates/data
diff --git a/app/templates/impl.rb b/templates/impl.rb
similarity index 100%
rename from app/templates/impl.rb
rename to templates/impl.rb
diff --git a/app/templates/run.rb b/templates/run.rb
similarity index 100%
rename from app/templates/run.rb
rename to templates/run.rb
diff --git a/app/templates/test.rb b/templates/test.rb
similarity index 100%
rename from app/templates/test.rb
rename to templates/test.rb