diff --git a/README.md b/README.md
index 9de936f..b2c4c68 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,11 @@
-# spinner
+# Spinner
 
-TODO: Write a description here
+Terminal Spinner for Crystal Programming Language
+
+![All](/images/all.gif)
 
 ## Installation
 
-
 Add this to your application's `shard.yml`:
 
 ```yaml
@@ -13,20 +14,23 @@ dependencies:
     github: askn/spinner
 ```
 
-
 ## Usage
 
 
 ```crystal
 require "spinner"
+
+sp = Spin.new
+sp.start
+sleep 3
+sp.stop
 ```
 
+## Options
 
-TODO: Write usage instructions here
+`delay`: `default = 0.1`
 
-## Development
-
-TODO: Write development instructions here
+`chars`: you can choose charset from [CHARSET](src/spinner/charset.cr) `default = CHARSET[:pipe]`
 
 ## Contributing
 
diff --git a/examples/all.cr b/examples/all.cr
new file mode 100644
index 0000000..e843557
--- /dev/null
+++ b/examples/all.cr
@@ -0,0 +1,8 @@
+require "../src/spinner"
+
+CHARSET.values.each do |chars|
+  sp = Spin.new(0.1, chars)
+  sp.start
+  sleep 2
+  sp.stop
+end
diff --git a/examples/color.cr b/examples/color.cr
new file mode 100644
index 0000000..76583bd
--- /dev/null
+++ b/examples/color.cr
@@ -0,0 +1,11 @@
+require "../src/spinner"
+require "colorize"
+
+chars = CHARSET[:arrow].map do |c|
+  c.colorize(:light_green)
+end
+
+spin = Spin.new(0.2, chars)
+spin.start
+sleep 3
+spin.stop
diff --git a/examples/pavyon.cr b/examples/pavyon.cr
new file mode 100644
index 0000000..e303f05
--- /dev/null
+++ b/examples/pavyon.cr
@@ -0,0 +1,12 @@
+require "../src/spinner"
+require "colorize"
+
+colors = {:red, :light_red, :yellow, :green, :light_blue, :blue, :magenta}
+chars = colors.map do |color|
+  ".xXx.".colorize(color)
+end
+
+spin = Spin.new(0.01, chars)
+spin.start
+sleep 3
+spin.stop
diff --git a/examples/simple.cr b/examples/simple.cr
new file mode 100644
index 0000000..1a43138
--- /dev/null
+++ b/examples/simple.cr
@@ -0,0 +1,19 @@
+require "../src/spinner"
+
+puts "starting..."
+sp = Spin.new(0.1)
+sp.start
+sleep 3
+sp.stop
+puts "end!"
+
+sp1 = Spin.new(0.1, CHARSET[:three_dots])
+sp1.start
+sleep 3
+sp1.stop
+
+sp1 = Spin.new(0.1)
+sp1.chars = CHARSET[:arrow]
+sp1.start
+sleep 3
+sp1.stop
diff --git a/images/all.gif b/images/all.gif
new file mode 100644
index 0000000..1f998c9
Binary files /dev/null and b/images/all.gif differ
diff --git a/src/spinner.cr b/src/spinner.cr
index 4b0c6f3..d2811e3 100644
--- a/src/spinner.cr
+++ b/src/spinner.cr
@@ -1,5 +1,38 @@
 require "./spinner/*"
 
-module Spinner
-  # TODO Put your code here
+class Spin
+  property delay, chars
+
+  CL    = STDOUT.tty? ? "\u001b[0G" : "\u000d \u000d"
+  CLEAR = STDOUT.tty? ? "\u001b[2K" : "\u000d"
+
+  def initialize(@delay = 0.1, @chars = CHARSET[:pipe])
+    @state = true
+  end
+
+  def stop
+    @state = false
+    print CLEAR
+  end
+
+  private def clear(count)
+    print CL * count
+  end
+
+  def start
+    spawn do
+      i = 0
+      while @state
+        chars = @chars[i % @chars.size]
+
+        print "#{chars}"
+        # to_s for colorize
+        clear(chars.to_s.size)
+
+        sleep @delay
+
+        i += 1
+      end
+    end
+  end
 end
diff --git a/src/spinner/charset.cr b/src/spinner/charset.cr
new file mode 100644
index 0000000..5bce012
--- /dev/null
+++ b/src/spinner/charset.cr
@@ -0,0 +1,32 @@
+CHARSET = {
+  arrow:      {"←", "↖", "↑", "↗", "→", "↘", "↓", "↙"},
+  fan:        {"┤", "┘", "┴", "└", "├", "┌", "┬", "┐"},
+  fan1:       {"+", "x"},
+  fan2:       {"v", "<", "^", ">"},
+  triangle:   {"◢", "◣", "◤", "◥"},
+  square:     {"◰", "◳", "◲", "◱"},
+  circle:     {"◴", "◷", "◶", "◵"},
+  big_circle: {"◐", "◓", "◑", "◒"},
+  boom:       {".", "o", "O", "@", "*"},
+  pipe:       {"|", "/", "-", "\\"},
+  alphabet:   {"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"},
+  three_dots: {".  ", ".. ", "..."},
+  eyes:       {"◡◡", "⊙⊙", "◠◠"},
+  dots:       {"⠁", "⠂", "⠄", "⡀", "⢀", "⠠", "⠐", "⠈"},
+  snake:      {"⣾", "⣽", "⣻", "⢿", "⡿", "⣟", "⣯", "⣷"},
+  snake1:     {"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"},
+  snake2:     {"⠋", "⠙", "⠚", "⠒", "⠂", "⠂", "⠒", "⠲", "⠴", "⠦", "⠖", "⠒", "⠐", "⠐", "⠒", "⠓", "⠋"},
+  square1:    {"■", "□", "▪", "▫"},
+  square2:    {"▖", "▘", "▝", "▗"},
+  square3:    {"▁", "▃", "▄", "▅", "▆", "▇", "█", "▇", "▆", "▅", "▄", "▃", "▁"},
+  square4:    {"▉", "▊", "▋", "▌", "▍", "▎", "▏", "▎", "▍", "▌", "▋", "▊", "▉"},
+  square5:    {"▁", "▂", "▃", "▄", "▅", "▆", "▇", "█", "▉", "▊", "▋", "▌", "▍", "▎", "▏", "▏", "▎", "▍", "▌", "▋", "▊", "▉", "█", "▇", "▆", "▅", "▄", "▃", "▂", "▁"},
+  thin_arrow: {"←", "↑", "→", "↓"},
+  big_arraw:  {"⇐", "⇖", "⇑", "⇗", "⇒", "⇘", "⇓", "⇙"},
+  baloon:     {".", "o", "O", "°", "O", "o", "."},
+  progress:   {"[          ]", "[=         ]", "[==        ]", "[===       ]", "[====      ]", "[=====     ]", "[======    ]", "[=======   ]", "[========  ]", "[========= ]", "[==========]"},
+  progress1:  {"(*---------)", "(-*--------)", "(--*-------)", "(---*------)", "(----*-----)", "(-----*----)", "(------*---)", "(-------*--)", "(--------*-)", "(---------*)"},
+  progress2:  {"█▒▒▒▒▒▒▒▒▒", "███▒▒▒▒▒▒▒", "█████▒▒▒▒▒", "███████▒▒▒", "██████████"},
+  progress3:  {"[                    ]", "[=>                  ]", "[===>                ]", "[=====>              ]", "[======>             ]", "[========>           ]", "[==========>         ]", "[============>       ]", "[==============>     ]", "[================>   ]", "[==================> ]", "[===================>]"},
+  fish:       {">))'>    ", " >))'>   ", "  >))'>  ", "   >))'> ", "    >))'>", "    <'((<", "   <'((< ", "  <'((<  ", " <'((<   ", "<'((<    "},
+}