<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>