var myListener:Object = new Object();
myListener.onKeyDown = function() {
if (Key.getCode() == Key.LEFT) {
circle._x -= 10;
} else if (Key.getCode() == Key.RIGHT) {
circle._x += 10;
} else if (Key.getCode() == Key.UP) {
circle._y -= 10;
} else if (Key.getCode() == Key.DOWN) {
circle._y += 10;
}
};
Key.addListener(myListener);