Untitled

dabblet.css

.container {
	width: 160px;
	height: 90px;
	margin: 100px auto;
	background: #58a; 
	background: linear-gradient(135deg, transparent 15px, #58a 0) top left,				
				linear-gradient(-135deg, transparent 15px, #58a 0) top right,
				linear-gradient(-45deg, transparent 15px, #58a 0) bottom right,
				linear-gradient(45deg, transparent 15px, #58a 0) bottom left;
	background-size: 50% 50%;
	background-repeat: no-repeat;
}

dabblet.html

<div class="container"><div>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split","fontsize":"100","seethrough":"","prefixfree":"1","page":"css"}