User:Chrs/bouncy.css

@keyframes x {
	from { left: 0; }
}

@keyframes y {
	from { top: 0; }
}

@keyframes x-ubox {
	from { left: 0; }
	to { left: calc(100vw - 240px); }
}

@keyframes y-ubox {
	from { top: 0; }
	to { top: calc(100vh - 45px); }
}