package { import flash.display.*; public class Main extends Sprite { public function Main() { for (var i:Number = 5; i-- > 0;) { addChild(new MotionTail); } } public function remove(child:DisplayObject):void { removeChild(child); } } } import flash.display.*; import flash.geom.Point; import flash.events.*; class Babble extends Sprite { private var cvx:Number; private var cvy:Number; private var vx:Number; private var vy:Number; private var d:Number; private var p:Point; public function Babble(depth:Number) { d = depth; p = new Point(); addEventListener(Event.ADDED_TO_STAGE, initialize); addEventListener(Event.REMOVED_FROM_STAGE, uninitialize); } private function initialize(event:Event):void { var initv:Number = 8; vx = Math.random() * initv - initv / 2; vy = Math.random() * initv - initv / 2; var radius:uint = Math.random() * 20 + 10; radius /= d; /*var radius:uint = 10;*/ if (Math.random() * 2 > 1.2) graphics.beginFill(0xffffff); else graphics.beginFill(0x000000); graphics.drawCircle(-radius / 2, -radius / 2, radius); graphics.drawCircle(-radius / 2, -radius / 2, radius / 2); graphics.endFill(); addEventListener(Event.ENTER_FRAME, transitionVector); addEventListener(Event.ENTER_FRAME, motion); } private function transitionVector(event:Event):void { vx += Math.random() * 2 > 1? (Math.random() * 20) / 50: -(Math.random() * 20) / 50; vy += Math.random() * 2 > 1? (Math.random() * 20) / 50: -(Math.random() * 20) / 50; vx /= 1.09; vy /= 1.09; } private function motion(event:Event):void { x += vx / d; y += vy / d; scaleX /= 1.1; scaleY /= 1.1; scaleX -= 0.005; scaleY -= 0.005; if (width < 1) destroy(); } public function destroy():void { removeEventListener(Event.ADDED_TO_STAGE, initialize); removeEventListener(Event.REMOVED_FROM_STAGE, uninitialize); removeEventListener(Event.ENTER_FRAME, transitionVector); removeEventListener(Event.ENTER_FRAME, motion); var p:Main = parent as Main; p.remove(this); } private function uninitialize(event:Event):void { } } class MotionTail extends Sprite { private var vx:Number; private var vy:Number; private var vs:Number; private var bx:Number; private var by:Number; public function MotionTail() { addEventListener(Event.ADDED_TO_STAGE, initialize); addEventListener(Event.REMOVED_FROM_STAGE, uninitialize); addEventListener(Event.ENTER_FRAME, crusing); addEventListener(Event.ENTER_FRAME, addBabble); } private function initialize(event:Event):void { vs = Math.random() * 50 + 100; vx = 0; vy = 0; x = Math.random() * stage.stageWidth; y = Math.random() * stage.stageHeight; bx = Math.random() * stage.stageWidth; by = Math.random() * stage.stageHeight; graphics.beginFill(0x000000); graphics.drawCircle(0, 0, 2); graphics.endFill(); } private function uninitialize(event:Event):void { removeEventListener(Event.ADDED_TO_STAGE, initialize); removeEventListener(Event.REMOVED_FROM_STAGE, uninitialize); removeEventListener(Event.ENTER_FRAME, crusing); removeEventListener(Event.ENTER_FRAME, addBabble); } private function crusing(event:Event):void { var bs:Number = 5; bx += Math.random() * 2 > 1? (Math.random() * bs): -(Math.random() * bs); by += Math.random() * 2 > 1? (Math.random() * bs): -(Math.random() * bs); if (bx > stage.stageWidth) bx = stage.stageWidth / 2; if (by > stage.stageWidth) by = stage.stageWidth / 2; vx += (bx - x) / vs; vy += (by - y) / vs; vx /= 1.005; vy /= 1.005; x += vx / 1; y += vy / 1; } private function addBabble(event:Event):void { for (var i:uint = 3; i-- > 0;) { var babble:Babble = new Babble(1); babble.x = x; babble.y = y; parent.addChild(babble); } } }