.frame-spin{animation:square-spin 3s cubic-bezier(.09,.57,.49,.9) 0s infinite;animation-fill-mode:both}@keyframes square-spin{0%{transform:perspective(100px) rotateX(0) rotateY(0)}25%{transform:perspective(100px) rotateX(180deg) rotateY(0)}50%{transform:perspective(100px) rotateX(180deg) rotateY(180deg)}75%{transform:perspective(100px) rotateX(0) rotateY(180deg)}to{transform:perspective(100px) rotateX(0) rotateY(1turn)}}