package {
    import flash.display.Sprite;
    import flash.events.Event;
    [SWF(width="400", height="200", backgroundColor="0x000000", frameRate="30")]
    public class FlashTest extends Sprite {
        private var time:int = 0;
 
        public function FlashTest() {
            // write as3 code here..
            Init();
        }
        
        private function Init():void {
            time= 0;
            addEventListener(Event.ENTER_FRAME, Draw);
       }
        private function Draw(event:Event):void {
            graphics.clear();
            graphics.beginFill(0x00FFFF);
            graphics.lineStyle(1, 0xFFFFFF);
            for (var i:int = 0; i < 30; i++) {
                graphics.drawCircle(50 + i * 10, 80 + Math.sin(i / 5 + time / 10) * 50, 3);
            }
            graphics.endFill();
            time++;   
        }
    }
}

Sinuswave circles

ActionScript 3