Untitled

dabblet.css

div {
	background-color: #900;
	background-image: linear-gradient(top, #c60000, #b30000 50%, #990000 50%, #990000);
	width: 400px;
	height: 200px;
	position: relative
}

div:before {
	content: '';
	border-right: 66px solid #fff;
	border-bottom: 100px solid transparent;
	-webkit-transform: rotate(0.01deg);
	position: absolute;
	top: 0;
	right: 0;
	width: 0;
	height: 0;
}

dabblet.html

<div></div>

settings.json

{"view":"separate","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"}