[AzagThoth]

this.but_left.onPress = function() {
tmp = setInterval (walk,1);
};
 
walk = function(){
	if(_root.event1._x < 50){
		_root.event1._x += 3;
		_root.event2._x += 3;
		_root.event3._x += 3;
		_root.event4._x += 3;
	}else{
		_root.event1._x -= 0;
		_root.event2._x -= 0;
		_root.event3._x -= 0;
		_root.event4._x -= 0;
	clearInterval(tmp)
	}
}

Может так попробовать?