Трапеция

dabblet.css

/**
 * Трапеция
 */
.stage {
	perspective: 600px;
}

.trapezoid {
	width: 600px;
	height: 300px;
	background: black;
	transform: rotateX(30deg) skew(15deg) translateZ(-60px);

}

dabblet.html

<div class="stage"><div class="trapezoid"></div></div>

dabblet.js

// alert('Hello world!');

settings.json

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