<script src="http://spelprogrammering.nu/simple.js">
function start()
{
  var l_system = 'F+F--F+F+F+F--F+F--F+F--F+F+F+F--F+F';
  
  var angle = 60;
  var length = 40;
  
  var events = {};
  events['F'] = function() { turtle.move(length); };
  events['+'] = function() { turtle.turnLeft(angle) };
  events['-'] = function() { turtle.turnRight(angle) };
  
  for (var i = 0; i < l_system.length; i++)
  {
    events[l_system[i]]();
  }
}
</script>