practice_wonderfl

/**
 * Copyright arere ( http://wonderfl.net/user/arere )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/xkT3
 */

package {
    import flash.display.*;
    import flash.events.Event;
    
    [SWF(frameRate="30", width = "465", height = "465")]
    public class MyFirstAnimation extends Sprite{
    		private var _circle:Circle;
    		
    		public function MyFirstAnimation(){
    			
    			_circle = new Circle(10);
    			
    			_circle.alpha = 0.25;
    			_circle.vx = 3;
    			_circle.vy = 4;
    			
    			
    			_circle.x = 465 / 2;
    			_circle.y = 465 / 2;
    			
    			addChild(_circle);
    			
    			
    			addEventListener(Event.ENTER_FRAME, enterFrameHandler);
    		}
    		
    		private function enterFrameHandler(e:Event):void{
    			
    			_circle.move();
    		}
    }
}

import flash.display.Sprite;

class Circle extends Sprite{
	public var vx:Number;
	public var vy:Number;
	public var radius:Number;
	
	public function Circle(_radius:Number, _fillColor:uint = 0x000000){
		
		graphics.beginFill(_fillColor);
		graphics.drawCircle(0, 0, _radius);
		graphics.endFill();
		
		radius = _radius;
	}
	
	public function move():void{
		x += vx;
		y += vy;
	}
}