<style>
		#playing {
			border: 1px solid gray;
			position: relative;
			width: 600px;
			height: 450px;
		}
		#fire {
			border: 1px solid gray;
			width: 50px;
			height: 15px;
			border-radius: 10px 10px 0 0;
			background-color: darkblue;
			position: absolute;
			bottom: 0;
			left: 275px;	
		}
		#fire p {
			width: 20px;
			display: inline-block;
			position: absolute;
			top: -0.5em;
			left: 25px;
			padding: 0;
			margin: 0;
		}
	</style>

<h1>用方向按鍵移動發射台</h1>

<div id='playing'>

<div id='fire'>
<p>|</p>
</div>
</div>