.i-medium{
	position : absolute;
	top: 0; right: 0; bottom: 0; left: 0;
}
.i-medium {
	background: url("medium.png") repeat 0px 0px;
	-webkit-animation: dropFlowParticles 12s linear infinite;
	     -o-animation: dropFlowParticles 12s linear infinite;
	        animation: dropFlowParticles 12s linear infinite;
}

@-webkit-keyframes dropFlowParticles {
	from { background-position: 0 0; }
	to { background-position: 0 413px; }
}
@keyframes dropFlowParticles {
	from { background-position: 0 0; }
	to { background-position: 0 413px; }
}