.cloud:first-child{width:auto;height:40px;animation:100s linear -200s infinite reverse both wind_right;top:45px}.cloud:nth-child(2){z-index:-1;width:auto;height:46.6px;animation:75s linear -200s infinite reverse both wind_left;top:100px}.cloud:nth-child(3){z-index:-1;width:auto;height:46.6px;animation:83s linear -260s infinite reverse both wind_right;top:143px}.cloud:nth-child(4){z-index:-1;width:auto;height:46.6px;animation:30s linear -100s infinite reverse both wind_right;top:176px}.cloud:nth-child(5){z-index:-1;width:auto;height:46.6px;animation:65s linear -170s infinite reverse both wind_right;top:200px}.cloud:nth-child(6){z-index:-1;width:auto;height:46.6px;animation:43s linear -150s infinite reverse both wind_left;top:31px}@keyframes wind_right{0%{left:-20%}to{left:120%}}@keyframes wind_left{0%{right:-20%}to{right:120%}}