Havoc24k

var intervalID;
var left = 37;
var up = 38;
var right = 39;
var down = 40;
var keyboardEvent = document.createEvent("KeyboardEvent");
var initMethod = typeof keyboardEvent.initKeyboardEvent !== 'undefined' ? "initKeyboardEvent" : "initKeyEvent";
var i = 0;

// set interval of execution and sequence of keystrokes