.shake {
	animation: bellshake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97) 2s infinite;
	backface-visibility: hidden;
	transform-origin: top right;
}

@keyframes bellshake {
	0% {
		transform: rotate(0);
	}
	15% {
		transform: rotate(5deg);
	}
	30% {
		transform: rotate(-5deg);
	}
	45% {
		transform: rotate(4deg);
	}
	60% {
		transform: rotate(-4deg);
	}
	75% {
		transform: rotate(2deg);
	}
	85% {
		transform: rotate(-2deg);
	}
	92% {
		transform: rotate(1deg);
	}
	100% {
		transform: rotate(0);
	}
}