{
 "metadata": {
  "gist_id": "b22e8d7dc02c540373a7",
  "name": "",
  "signature": "sha256:2be12ee1d4a29c12286824debe62f47b1b6d2379f30d3ed3e9896b2f48ce9ea2"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Draw a tree with turtle"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import turtle\n",
      "import random\n",
      "\n",
      "finished = []\n",
      "\n",
      "def draw_leaves():\n",
      "    for turtle in finished:\n",
      "        for i in range(20):\n",
      "            turtle.begin_fill()\n",
      "            rand = random.randint(-16, 16)\n",
      "            turtle.color((16 + rand, 128 + rand, 16 + rand))\n",
      "            turtle.circle(random.randint(4, 8), steps=5)\n",
      "            turtle.left(36)\n",
      "            turtle.penup()\n",
      "            turtle.forward(random.randint(8, 20))\n",
      "            turtle.pendown()\n",
      "            turtle.end_fill()\n",
      "\n",
      "def draw_branch(turtle, level=12):\n",
      "    if level > 0:\n",
      "        turtle.pensize(level)\n",
      "        clone = turtle.clone()\n",
      "\n",
      "        turtle.left(random.randint(1, 20))\n",
      "        turtle.forward(random.randint(2, 8) * level)\n",
      "        draw_branch(turtle, level-random.randint(1,3))\n",
      "\n",
      "        clone.right(random.randint(1, 20))\n",
      "        clone.forward(random.randint(2, 8) * level)\n",
      "        draw_branch(clone, level-random.randint(1,3))\n",
      "    else:\n",
      "        turtle.pensize(1)\n",
      "        finished.append(turtle)\n",
      "\n",
      "def draw():\n",
      "    turtle.setup(800, 600)\n",
      "    turtle.colormode(255)\n",
      "    turtle.bgcolor(\"white\")\n",
      "    turtle.pensize(13)\n",
      "    turtle.color(\"brown\")\n",
      "    turtle.speed(10000000)\n",
      "    turtle.hideturtle()\n",
      "\n",
      "    turtle.penup()\n",
      "    turtle.right(90)\n",
      "    turtle.forward(300)\n",
      "\n",
      "    turtle.pendown()\n",
      "    turtle.right(180)\n",
      "    turtle.forward(250)\n",
      "    draw_branch(turtle)\n",
      "    draw_leaves()\n",
      "\n",
      "draw()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
   "metadata": {}
  }
 ]
}