@keyframes ants{to{background-position:100% 100%}}.selected-piece-outline{position:absolute;top:-2px;left:-2px;right:-2px;bottom:-2px;border-radius:4px;pointer-events:none;background-image:linear-gradient(45deg,white 25%,transparent 0,transparent 50%,white 0,white 75%,transparent 0,transparent);background-size:10px 10px;animation:ants 4s linear infinite;-webkit-mask-composite:destination-out;mask-composite:exclude;-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0)}@keyframes marching-ants{to{stroke-dashoffset:-28}}.selection-box{fill:rgba(255,255,255,.1);stroke:white;stroke-width:2;stroke-dasharray:14 14;animation:marching-ants 4s linear infinite}