"animated prelaoder"
Bootstrap 4.1.1 Snippet by ALIMUL AL RAZY

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<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <body onload="loader()"> <div class="loader"> <div class="box"> <div></div> <div></div> <div></div> <div></div> </div> <div class="box"> <div></div> <div></div> <div></div> <div></div> </div> <div class="box"> <div></div> <div></div> <div></div> <div></div> </div> <div class="box"> <div></div> <div></div> <div></div> <div></div> </div> </div> </body>
.loader{ --size: 32px; --duration: 800ms; width: 96px; height: 64px; margin: 50px auto; transform-style: preserve-3d; transform-origin: 50% 50%; transform: rotateX(60deg) rotateZ(45deg) rotateY(0deg) translateZ(0px); position: relative; } .loader .box{ width: 32px; height: 32px; transform-style: preserve-3d; position: absolute; top: 0; left: 0; } .loader .box:nth-child(1){ transform: translate(100%, 0); animation: box1 800ms linear infinite; } .loader .box:nth-child(2){ transform: translate(0, 100%); animation: box2 800ms linear infinite; } .loader .box:nth-child(3){ transform: translate(100%, 100%); animation: box3 800ms linear infinite; } .loader .box:nth-child(4){ transform: translate(200%, 0); animation: box4 800ms linear infinite; } .loader .box > div{ --translateZ: calc(var(--size) / 2); --rotateY: 0deg; --rotateX: 0deg; background: #00436b; width: 100%; height: 100%; transform: rotateY(var(--rotateY)) rotateX(var(--rotateX)) translateZ(var(--translateZ)); position: absolute; top: auto; right: auto; bottom: auto; left: auto; } .loader .box > div:nth-child(1){ top: 0; left: 0; } .loader .box > div:nth-child(2){ background: #00436b; right: 0; --rotateY: 90deg; } .loader .box > div:nth-child(3){ background: #00436b; --rotateX: -90deg; } .loader .box > div:nth-child(4){ background: #dbe3f4; top: 0; left: 0; --translateZ: calc(var(--size) * 3 * -1); } @keyframes box1{ 0%, 50%{ transform: translate(100%, 0); } 100%{ transform: translate(200%, 0); } } @keyframes box2{ 0%{ transform: translate(0, 100%); } 50%{ transform: translate(0, 0); } 100%{ transform: translate(100%, 0); } } @keyframes box3{ 0%, 50%{ transform: translate(100%, 100%); } 100%{ transform: translate(0, 100%); } } @keyframes box4{ 0%{ transform: translate(200%, 0); } 50%{ transform: translate(200%, 100%); } 100%{ transform: translate(100%, 100%); } } License Terms

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