diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..a6abc75
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,7 @@
+source :rubygems
+
+gem "rack"
+gem "rack-mount"
+gem "rack-contrib"
+gem "thin"
+gem "activesupport"
diff --git a/app.rb b/app.rb
new file mode 100644
index 0000000..d861790
--- /dev/null
+++ b/app.rb
@@ -0,0 +1,13 @@
+require "rack"
+
+class MyApp
+  def call(env)
+    [
+      200,
+      {"Content-Type" => "text/plain"},
+      ["Hello Rackers!"]
+    ]
+  end
+end
+
+Rack::Handler::Thin.run MyApp.new, :Port => 1234
diff --git a/builder.rb b/builder.rb
new file mode 100644
index 0000000..1a2cae8
--- /dev/null
+++ b/builder.rb
@@ -0,0 +1,25 @@
+require "rack"
+
+class MyApp
+  def call(env)
+    [
+      200,
+      {"Content-Type" => "text/plain"},
+      ["Hello Rackers!"]
+    ]
+  end
+end
+
+app = Rack::Builder.app do
+  use Rack::ContentLength
+
+  map "/codeplane" do
+    run MyApp.new
+  end
+
+  map "/howto" do
+    run MyApp.new
+  end
+end
+
+Rack::Handler::Thin.run app, :Port => 1234
diff --git a/config.ru b/config.ru
new file mode 100644
index 0000000..50e9cf1
--- /dev/null
+++ b/config.ru
@@ -0,0 +1,14 @@
+class MyApp
+  def call(env)
+    [
+      200,
+      {"Content-Type" => "text/plain"},
+      ["Hello Rackers!"]
+    ]
+  end
+end
+
+use Rack::ContentLength
+use Rack::Lint
+
+run MyApp.new
diff --git a/fu.rb b/fu.rb
new file mode 100644
index 0000000..35a0ba6
--- /dev/null
+++ b/fu.rb
@@ -0,0 +1,136 @@
+require "rack"
+require "rack/mount"
+require "rack/contrib"
+require "active_support/hash_with_indifferent_access"
+
+class FU
+  class App
+    attr_reader :env
+    attr_accessor :callback
+
+    def initialize(callback)
+      @callback = callback
+    end
+
+    def request
+      @request ||= Rack::Request.new(env)
+    end
+
+    def params
+      @params ||= begin
+        params = request.params || {}
+        params.merge!(request.env["rack.request.form_hash"] || {})
+        params.merge!(request.env["rack.routing_args"] || {})
+        ActiveSupport::HashWithIndifferentAccess.new(params)
+      end
+    end
+
+    def call(env)
+      @env = env
+      instance_eval(&callback)
+    end
+  end
+
+  def self.app(&block)
+    new(&block).to_app
+  end
+
+  def initialize(&block)
+    instance_eval(&block)
+  end
+
+  def middlewares
+    @middlewares ||= []
+  end
+
+  def get(path, &block)
+    match(path, "GET", &block)
+  end
+
+  def post(path, &block)
+    match(path, "POST", &block)
+  end
+
+  def put(path, &block)
+    match(path, "PUT", &block)
+  end
+
+  def delete(path, &block)
+    match(path, "DELETE", &block)
+  end
+
+  def head(path, &block)
+    match(path, "HEAD", &block)
+  end
+
+  def match(path, method = nil, &block)
+    conditions = {path_info: compile_path(path)}
+    conditions[:request_method] = method if method
+
+    builder = Rack::Builder.new
+    builder.use Rack::ETag
+    builder.use Rack::ContentLength
+    builder.use Rack::MethodOverride
+    builder.use Rack::NestedParams
+
+    middlewares.each do |middleware, *args|
+      builder.use middleware, *args
+    end
+
+    app = App.new(block)
+    builder.run(app)
+
+    route_set.add_route(builder, conditions)
+  end
+
+  def use(middleware, *args)
+    middlewares << [middleware, args]
+  end
+
+  def to_app
+    route_set.freeze
+  end
+
+  private
+  def route_set
+    @route_set ||= Rack::Mount::RouteSet.new
+  end
+
+  def compile_path(path)
+    Rack::Mount::Strexp.compile Rack::Mount::Utils.normalize_path(path), {}, %w[/.?]
+  end
+end
+
+app = FU.app do
+  use Rack::Runtime
+
+  get "/" do
+    name = params.fetch(:name, "Rackers")
+
+    [
+      200,
+      {"Content-Type" => "text/html"},
+      ["Hello #{name}!"]
+    ]
+  end
+
+  get "/:name" do
+    [
+      200,
+      {"Content-Type" => "text/html"},
+      ["Hello #{params[:name]}!"]
+    ]
+  end
+
+  post "/" do
+    name = params.fetch(:name, "Rackers")
+
+    [
+      200,
+      {"Content-Type" => "text/html"},
+      ["Hello #{name}! Post data sent!"]
+    ]
+  end
+end
+
+Rack::Handler::Thin.run app, :Port => 1234
diff --git a/public/index.html b/public/index.html
new file mode 100644
index 0000000..89271ee
--- /dev/null
+++ b/public/index.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8">
+    <title></title>
+    <link rel="stylesheet" href="/style.css" type="text/css">
+  </head>
+
+  <body>
+    <h1>Hello Rackers!</h1>
+    <script type="text/javascript" src="/script.js"></script>
+  </body>
+</html>
diff --git a/public/script.js b/public/script.js
new file mode 100644
index 0000000..32931ca
--- /dev/null
+++ b/public/script.js
@@ -0,0 +1 @@
+document.write("<h2>#fuckyeah!</h2>");
\ No newline at end of file
diff --git a/public/style.css b/public/style.css
new file mode 100644
index 0000000..3287223
--- /dev/null
+++ b/public/style.css
@@ -0,0 +1,7 @@
+body {
+  background: blue;
+  color: yellow;
+  font-family: sans-serif;
+  font-size: 36px;
+  text-align: center;
+}
\ No newline at end of file
diff --git a/static.rb b/static.rb
new file mode 100644
index 0000000..0fe6629
--- /dev/null
+++ b/static.rb
@@ -0,0 +1,13 @@
+require "rack"
+
+app = Rack::Builder.new do
+  use Rack::Static,
+    urls: {"/" => "index.html"},
+    root: "public"
+
+  run Rack::URLMap.new({
+    "/" => Rack::Directory.new("public")
+  })
+end
+
+Rack::Handler::Thin.run app, :Port => 1234