flash on 2017-2-7

/**
 * Copyright tiMMy ( http://wonderfl.net/user/tiMMy )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/KyGF
 */

package {
    import flash.events.Event;
    import flash.display.Sprite;
    
    public class FlashTest extends Sprite {
        
        protected var fTime: Number = 0;
        protected var fDeltaTime: Number = 0;
        protected var fX: Number = 0;
        protected var fY: Number = 0;
        protected var fCircle: Sprite = null;
        protected var fFirstDraw: Boolean = true;
        
        public function FlashTest() {
            // write as3 code here..
            addEventListener( Event.ADDED_TO_STAGE, onAddedToStage );
            addEventListener( Event.ENTER_FRAME, onUpdate ); 
        }
        
        protected function onAddedToStage (e: Event): void
        {
            fDeltaTime = 1/stage.frameRate;
            
            graphics.beginFill(0xF77149, 1);
            graphics.lineStyle(2, 0x000000, 0); 
            graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight);
            graphics.endFill();
            
            fCircle = new Sprite();
            fCircle.graphics.beginFill(0xFFFFFF, 0.3);
            fCircle.graphics.drawEllipse(-15, -15, 30, 30);
            fCircle.graphics.endFill();
            
            graphics.lineStyle(2, 0x000000, 0.5); 
            
            addChild ( fCircle );
        }
        
        protected function onUpdate( e: Event): void
        {
            fTime += fDeltaTime;
            fX = stage.stageWidth / 2 + Math.cos(fTime) * 40 * (Math.cos(fTime*3) * Math.cos(fTime*3) + 1);
            fY = stage.stageWidth / 2 + Math.sin(fTime) * 40 * (Math.cos(fTime*3) * Math.cos(fTime*3) + 1);
            fCircle.x = fX;
            fCircle.y = fY;
            
            if(fFirstDraw)
            {
                fFirstDraw = false;
                graphics.moveTo( fX, fY );
            }
            else
                graphics.lineTo( fX, fY );
        }

    }
}