monaco-editor/website/playground/spinner.css

/* ---- BEGIN loading spinner ---- */
#loading .spinner {
	margin: 100px auto;
	width: 50px;
	height: 40px;
	text-align: center;
	font-size: 10px;
}

#loading .spinner > div {
	background-color: #333;
	height: 100%;
	width: 6px;
	display: inline-block;

	-webkit-animation: sk-stretchdelay 1.2s infinite ease-in-out;
	animation: sk-stretchdelay 1.2s infinite ease-in-out;
}

#loading .spinner .rect2 {
	-webkit-animation-delay: -1.1s;
	animation-delay: -1.1s;
}

#loading .spinner .rect3 {
	-webkit-animation-delay: -1s;
	animation-delay: -1s;
}

#loading .spinner .rect4 {
	-webkit-animation-delay: -0.9s;
	animation-delay: -0.9s;
}

#loading .spinner .rect5 {
	-webkit-animation-delay: -0.8s;
	animation-delay: -0.8s;
}

@-webkit-keyframes sk-stretchdelay {
	0%,
	40%,
	100% {
		-webkit-transform: scaleY(0.4);
	}
	20% {
		-webkit-transform: scaleY(1);
	}
}

@keyframes sk-stretchdelay {
	0%,
	40%,
	100% {
		transform: scaleY(0.4);
		-webkit-transform: scaleY(0.4);
	}
	20% {
		transform: scaleY(1);
		-webkit-transform: scaleY(1);
	}
}
/* ---- END loading spinner ---- */