*
{
	margin:0;
	padding:0;
	box-sizing:border-box;
}
body{
	background:#000;
	overflow:hidden;
	height:100vh;
}

i{
	position:absolute;
	height:200px;
	background:linear-gradient(transparent, #fff);
	border-bottom-left-radius: 5px;
	border-bottom-right-radius: 5px;
	animation:animate 5s linear infinite;
}

i:nth-child(3n+1)
{
	background:linear-gradient(transparent, #0ff);
}
i:nth-child(3n+2)
{
	background:linear-gradient(transparent, #0f0);
}
i:nth-child(3n+3)
{
	background:linear-gradient(transparent, #f00);
}

@keyframes animate{
	0%{
		transform:translateY(-200px);
	}
	100%{
		transform:translateY(calc(100vh + 200px));
	}
}