div.divBlack300px{
	background-color: black;
	width: 300px; height: 300px;
	margin: auto;
	border-top: 1px solid black;
}

div.divRed50px{
	width: 50px; height: 50px;
	background-color: red;
}
	

/* button white on red */
button.btnWhiteOnRed {
	color: white;
	background: red;
	padding: 5px;
	display: block;
	margin: 10px auto;
	border: 1px solid white;
	border-radius: 5px 5px;
}

/* demo - css @keyframes Animation*/
@keyframes redDiv_goRight {
	from {margin-left: 0px;}
	to {margin-left: 250px;}
}

@keyframes redDiv_goDown{
	from {margin-top: 0px;}
	to {margin-top: 250px;}
}

div#demoCSSkeyframes_redDiv{
	margin-left: 0px;
	margin-top: 0px;
}
  
.redDivMarginLeft { 
	animation-name: redDiv_goRight;
	animation-duration: 4s;
}

.redDivMarginTop{ 
	animation-name: redDiv_goDown;
	animation-duration: 4s;
}