#pongStick1  {
			text-align: center;
			background-color: transparent;
			color: white;
			width: 40px;
			height: 150px;
			position: absolute;
			left: 40px;
		}

		#pongStick2 {
			text-align: center;
			background-color: transparent;
			color: white;
			width: 40px;
			height: 150px;
			position: absolute;
			right: 40px;
		}

		#pongScore {
			display: none;
			position: absolute;
			background-color: transparent;
  		text-align: center;
  		font-size: 120px;
			color: white;
			width: 80px;
			height: 80px;
			left: 50%;
			top: 50%;
			margin-left: -40px;
			margin-top: -40px;
			line-height: 70px;
		}

		#pongBall {
			display: none;
			position: absolute;
			width: 80px;
			height: 80px;
			border-radius: 40px;
			left: 50%;
			top: 50%;
			background-color: transparent;
			margin-left: -40px; /* width의 절반 */
			margin-top: -40px; /* height의 절반 */
		}

		#pongBallText {
			position: absolute;
			background: white;
			width: 80px;
			height: 80px;
			border-radius: 40px;
			line-height: 80px;
		}

		#pongSrc {
			display: none;
			position: fixed;
			background-color: transparent;
			color: gray;
			text-shadow: 1px 1px 1px black;
			text-decoration: underline;
		}

		#pongSrc:hover { cursor: pointer; }

		#exitPong {
			display: none;
			position: fixed;
			color: white;
			top: 20px;
			right: 20px;
		}