Flash8实现动态星空的通用方法

var stars = 150;
var maxSpeed = 12;
var minSpeed = 6
//create and position stars
for (var i = 0; i<stars; i++) {
 var star = this.attachMovie("star", "star"+i, i);
 star._x = random(Stage.width);
 star._y = random(Stage.height); 
 var size = random(2)+0.6*(random(4));
 star._width = size;
 star._height = size;
}

this.onEnterFrame = function() {
 for (var j = 0; j<stars; j++) {
  var s = this["star"+j];
  if (s._y>0) {
   s._y -= random(maxSpeed-minSpeed)+minSpeed;
  } else {
   s._y = Stage.height;
  }

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