<script src="http://spelprogrammering.nu/simple.js">
function start()
{
  turtle.direction = 75;
  turtle.y = totalHeight;
  turtle.x = 90;

  turtle.color = mixColor(100,100,70);

  shape = 'x';
  rules = {'x': 'F+[[x]-x]-F[-Fx]+x',
           'F': 'FF',
           '+': '+',
           '-': '-',
           '[': '[',
           ']': ']'};

  angle = 20;

  events = {};
  events['x'] = function() {};
  events['F'] = function() { turtle.move(3); };
  events['+'] = function() { turtle.turnLeft(angle) };
  events['-'] = function() { turtle.turnRight(angle) };
  events['['] = function() { turtle.pushPosition() };
  events[']'] = function() { turtle.popPosition(); };

  iterations = 7;

  for (var i = 0; i < iterations; i++)
  {
    currentLength = shape.length;
    newShape = '';
    for (var u = 0; u < currentLength; u++)
      newShape += rules[shape.charAt(u)];
    shape = newShape;
  }

  for (var i = 0; i < shape.length; i++)
    events[shape.charAt(i)]();
}
</script>