dabblet.css

/**
 * Just for fun: Wifi icon with pure CSS
 */

.wifi {
	padding: 20px;
}

.wifi, .wifi:before {
	display: inline-block;
	border: 60px double transparent;
	border-top-color: currentColor;
	border-radius: 50%;
}

.wifi:before {
	content: '';
	width: 0; height: 0;
}

dabblet.html

<div class="wifi" /></div>

dabblet.js

// alert('Hello world!');

settings.json

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