<div></div>
div {
	box-sizing: border-box;
	position: relative;
	border: solid 5em #000;
	border-image: repeating-linear-gradient(45deg, 
			#000, #000 1.5%, 
			transparent 1.5%, transparent 5%) 80;
	padding: 2em;
	width: 26em; height: 23em;
	background: linear-gradient(to right bottom, 
			#e18728, #4472b9);
	background-size: 50% 50%;	
}
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