// 設定發射子彈
stage.addEventListener(MouseEvent.MOUSE_DOWN, myshoot);
function myshoot(event:MouseEvent): void {
	var temp:bullet_mc = new bullet_mc();
	temp.x = mouseX;
	temp.y = mouseY;
	addChild(temp);
	temp.addEventListener(Event.ENTER_FRAME, bulletMove);
}

//讓字彈移動並漸漸縮小
function bulletMove(event:Event): void {
	if (event.target.scaleX > 0.3) {
		
		//一次縮小10%
		event.target.scaleX = event.target.scaleX - 0.1;
		event.target.scaleY = event.target.scaleY - 0.1;
	} else {
		event.target.parent.removeChild(event.target);
		event.target.removeEventListener(Event.ENTER_FRAME, bulletMove);
	}
}