.screen
{
	display:block;
	width:640px;
	height:480px;
	margin:auto;
	border:solid 1px black;
	position:relative;
	background-color:#000;
}

.particle
{
	width:29px;
	height:29px;
	position:absolute;
	background: url(/I/labs/fountain/spark.png);
	/*border:solid 1px red;*/
}