body{background:#141414}.loader{--loader: rgb(49, 180, 255);--loader-size: 30px;position:relative;top:40vh;margin:0 auto;width:100px;height:40px;overflow:hidden;transition:.5s;letter-spacing:2px}.loader span{position:absolute}.loader span:nth-child(1){top:0;left:-100%;width:100%;height:var(--loader-size);background:linear-gradient(90deg,transparent,var(--loader));animation:loader-anim1 1s linear infinite}@keyframes loader-anim1{0%{left:-100%}50%,to{left:100%}}.loader span:nth-child(2){top:-100%;right:0;width:var(--loader-size);height:100%;background:linear-gradient(180deg,transparent,var(--loader));animation:loader-anim2 1s linear infinite;animation-delay:.25s}@keyframes loader-anim2{0%{top:-100%}50%,to{top:100%}}.loader span:nth-child(3){bottom:0;right:-100%;width:100%;height:var(--loader-size);background:linear-gradient(270deg,transparent,var(--loader));animation:loader-anim3 1s linear infinite;animation-delay:.5s}@keyframes loader-anim3{0%{right:-100%}50%,to{right:100%}}.loader span:nth-child(4){bottom:-100%;left:0;width:var(--loader-size);height:100%;background:linear-gradient(360deg,transparent,var(--loader));animation:loader-anim4 1s linear infinite;animation-delay:.75s}@keyframes loader-anim4{0%{bottom:-100%}50%,to{bottom:100%}}