class Barrel extends MovieClip {
	// values for x and y directions
	private var vx:Number;
	private var vy:Number;
	private var nStageWidth:Number;
	// to reduce speed
	private var nSpeed:Number;
	
	function init(nSWidth:Number) {
		nStageWidth = nSWidth;
		nSpeed = 0;
		while(nSpeed ==0) {
			nSpeed = Math.floor(random(10)-5);
		}
		//trace("s" + nSpeed);
		//trace("wall" + _x + "-" + _width + "-" + nStageWidth); 
		onEnterFrame = slidePipe;
	}
	
	function slidePipe() {
		//trace(_x + "-" + nStageWidth + "-" + _width);
		// Make sure not about to hit edge
		if (_x < (nSpeed * -1)) {
			_x = 0;
			nSpeed = nSpeed * -1;
		} else if ( _x > (nStageWidth - 70 - nSpeed)) {
			_x = nStageWidth - 70;
			nSpeed = nSpeed * -1;
		} else {
			_x = _x + nSpeed;
		}
	}
	
	function getSpeed():Number {
		return nSpeed;
	}
}