as3.0 雪花随机下落

as3.0雪花随机飘落：package{importflash.display.MovieClip;importflash.events.*;publicclassSNOWextendsMovieClip{varspeedx:Number=0;varspeedy:Number=0;publicfunctionSNOW(){speedx=5*Math.random()-0.5;speedy=5*Math.random();this.addEventListener(Event.ENTER_FRAME,Mot);//constructorcode}funct