.cloudLeftAnim{animation-name:driftLeft;animation-duration:5000s;animation-iteration-count:infinite;animation-timing-function:linear}.cloudRightAnim{animation-name:driftRight;animation-duration:4000s;animation-iteration-count:infinite;animation-timing-function:linear}@keyframes driftLeft{0%{left:0}50%{left:-20rem}to{left:0}}@keyframes driftRight{0%{left:0}50%{left:15rem}to{left:0}}