<label class="loading">
    <input type="checkbox">
    <div>
        <span>Loading...</span>
        <span>Click for perspective</span>
        <ul>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
</label>

<label class="loading">
    <input type="checkbox" checked>
    <div>
        <span>Loading...</span>
        <span>Click for perspective</span>
        <ul>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
</label>

<a href="" class="restart">
    <svg viewBox="0 0 16 16" fill="currentColor">
        <path d="M4.5,4.5c1.9-1.9,5.1-1.9,7,0c0.7,0.7,1.2,1.7,1.4,2.7l2-0.3C14.7,5.4,14,4.1,13,3.1c-2.7-2.7-7.1-2.7-9.9,0 L0.9,0.9L0.2,7.3l6.4-0.7L4.5,4.5z"></path>
        <path d="M15.8,8.7L9.4,9.4l2.1,2.1c-1.9,1.9-5.1,1.9-7,0c-0.7-0.7-1.2-1.7-1.4-2.7l-2,0.3 C1.3,10.6,2,11.9,3,12.9c1.4,1.4,3.1,2,4.9,2c1.8,0,3.6-0.7,4.9-2l2.2,2.2L15.8,8.7z"></path>
    </svg>
    Restart
</a>

<!-- dribbble - twitter -->
<a class="dribbble" href="https://dribbble.com/aaroniker" target="_blank"><img src="https://cdn.dribbble.com/assets/dribbble-ball-mark-2bd45f09c2fb58dbbfb44766d5d1d07c5a12972d602ef8b32204d28fa3dda554.svg" alt=""></a>
<a class="twitter" target="_blank" href="https://twitter.com/aaroniker_me"><svg xmlns="http://www.w3.org/2000/svg" width="72" height="72" viewBox="0 0 72 72"><path d="M67.812 16.141a26.246 26.246 0 0 1-7.519 2.06 13.134 13.134 0 0 0 5.756-7.244 26.127 26.127 0 0 1-8.313 3.176A13.075 13.075 0 0 0 48.182 10c-7.229 0-13.092 5.861-13.092 13.093 0 1.026.118 2.021.338 2.981-10.885-.548-20.528-5.757-26.987-13.679a13.048 13.048 0 0 0-1.771 6.581c0 4.542 2.312 8.551 5.824 10.898a13.048 13.048 0 0 1-5.93-1.638c-.002.055-.002.11-.002.162 0 6.345 4.513 11.638 10.504 12.84a13.177 13.177 0 0 1-3.449.457c-.846 0-1.667-.078-2.465-.231 1.667 5.2 6.499 8.986 12.23 9.09a26.276 26.276 0 0 1-16.26 5.606A26.21 26.21 0 0 1 4 55.976a37.036 37.036 0 0 0 20.067 5.882c24.083 0 37.251-19.949 37.251-37.249 0-.566-.014-1.134-.039-1.694a26.597 26.597 0 0 0 6.533-6.774z"></path></svg></a>
// could be messy a bit

.loading {
    --load: 10000ms;
    --border: #646B8C;
    --background: #fff;
    --background-perspective: #F6F8FF;
    --active: #5C86FF;
    margin: 52px 0;
    & > div {
        transform: perspective(var(--p)) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
        transition: transform .5s;
        transform-style: preserve-3d;
        position: relative;
        cursor: pointer;
        span {
            display: block;
            color: var(--c, #404660);
            line-height: 23px;
            font-size: var(--s, 16px);
            font-weight: 500;
            margin-bottom: 8px;
            &:nth-child(2) {
                --c: #BBC1E1;
                --s: 14px;
                position: absolute;
                top: 100%;
                left: 0;
                margin-top: 8px;
            }
        }
        ul {
            width: 360px;
            height: 36px;
            margin: 0;
            padding: 0;
            list-style: none;
            li {
                --ry: 0deg;
                --z: 0;
                --x: 0;
                position: absolute;
                bottom: 0;
                background: var(--b, var(--background));
                border-top: 1px solid var(--border);
                border-bottom: 1px solid var(--border);
                width: var(--w, 200px);
                left: var(--l, 0);
                height: 36px;
                transform: rotateY(var(--ry)) translateZ(var(--z)) translateX(var(--x));
                transform-origin: 0 0;
                &:before {
                    content: '';
                    position: absolute;
                    left: 0;
                    top: 0;
                    right: 0;
                    bottom: 0;
                    background: var(--active);
                    transform-origin: var(--o, 0) 0;
                    transform: scaleX(0);
                    animation: fill var(--duration) linear forwards var(--delay);
                }
                &:nth-child(1) {
                    --delay: 0ms;
                    --duration: calc(var(--load) * calc(200 / 960));
                    border-left: 1px solid var(--border);
                }
                &:nth-child(2) {
                    --delay: calc(var(--load) * calc(200 / 960));
                    --duration: calc(var(--load) * calc(100 / 960));
                    --w: 100px;
                    --l: 200px;
                    --ry: 90deg;
                    --b: var(--background-perspective);
                }
                &:nth-child(3) {
                    --delay: calc(calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(100 / 960)));
                    --duration: calc(var(--load) * calc(32 / 960));
                    --w: 32px;
                    --l: 200px;
                    --z: -100px;
                }
                &:nth-child(4) {
                    --delay: calc(calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(32 / 960)));
                    --duration: calc(var(--load) * calc(100 / 960));
                    --w: 100px;
                    --l: 232px;
                    --ry: 90deg;
                    --o: 100%;
                    --b: var(--background-perspective);
                }
                &:nth-child(5) {
                    --delay: calc(calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(32 / 960)) + calc(var(--load) * calc(100 / 960)));
                    --duration: calc(var(--load) * calc(20 / 960));
                    --w: 20px;
                    --l: 232px;
                }
                &:nth-child(6) {
                    --delay: calc(calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(32 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(20 / 960)));
                    --duration: calc(var(--load) * calc(140 / 960));
                    --w: 140px;
                    --l: 252px;
                    --ry: 90deg;
                    --b: var(--background-perspective);
                }
                &:nth-child(7) {
                    --delay: calc(calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(32 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(20 / 960)) + calc(var(--load) * calc(140 / 960)));
                    --duration: calc(var(--load) * calc(24 / 960));
                    --w: 24px;
                    --l: 252px;
                    --z: -140px;
                }
                &:nth-child(8) {
                    --delay: calc(calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(32 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(20 / 960)) + calc(var(--load) * calc(140 / 960)) + calc(var(--load) * calc(24 / 960)));
                    --duration: calc(var(--load) * calc(200 / 960));
                    --w: 200px;
                    --l: 276px;
                    --ry: 90deg;
                    --x: -60px;
                    --o: 100%;
                    --b: var(--background-perspective);
                }
                &:nth-child(9) {
                    --delay: calc(calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(32 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(20 / 960)) + calc(var(--load) * calc(140 / 960)) + calc(var(--load) * calc(24 / 960)) + calc(var(--load) * calc(200 / 960)));
                    --duration: calc(var(--load) * calc(48 / 960));
                    --w: 48px;
                    --l: 276px;
                    --z: 60px;
                }
                &:nth-child(10) {
                    --delay: calc(calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(32 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(20 / 960)) + calc(var(--load) * calc(140 / 960)) + calc(var(--load) * calc(24 / 960)) + calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(48 / 960)));
                    --duration: calc(var(--load) * calc(60 / 960));
                    --w: 60px;
                    --l: 324px;
                    --ry: 90deg;
                    --x: -60px;
                    --b: var(--background-perspective);
                }
                &:nth-child(11) {
                    --delay: calc(calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(32 / 960)) + calc(var(--load) * calc(100 / 960)) + calc(var(--load) * calc(20 / 960)) + calc(var(--load) * calc(140 / 960)) + calc(var(--load) * calc(24 / 960)) + calc(var(--load) * calc(200 / 960)) + calc(var(--load) * calc(48 / 960)) + calc(var(--load) * calc(60 / 960)));
                    --duration: calc(var(--load) * calc(36 / 960));
                    --w: 36px;
                    --l: 324px;
                    border-right: 1px solid var(--border);
                }
            }
        }
    }
    input {
        display: none;
        &:checked {
            & + div {
                --rx: -16deg;
                --ry: -24deg;
                --p: 600px;
            }
        }
    }
}

@keyframes fill {
    to {
        transform: scaleX(1);
    }
}

.restart {
    display: table;
    position: absolute;
    bottom: 4%;
    left: 50%;
    transform: translateX(-50%);
    text-decoration: none;
    line-height: 23px;
    color: #BBC1E1;
    font-size: 14px;
    font-weight: 500;
    svg {
        margin: 4px 4px 0 0;
        width: 16px;
        height: 16px;
        display: inline-block;
        vertical-align: top;
    }
}

html {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

* {
    box-sizing: inherit;
    &:before,
    &:after {
        box-sizing: inherit;
    }
}

// Center & dribbble
body {
    min-height: 100vh;
    display: flex;
    font-family: 'Roboto', Arial;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background: #F6F8FF;
    .dribbble {
        position: fixed;
        display: block;
        right: 20px;
        bottom: 20px;
        img {
            display: block;
            height: 28px;
        }
    }
    .twitter {
        position: fixed;
        display: block;
        right: 64px;
        bottom: 14px;
        svg {
            width: 32px;
            height: 32px;
            fill: #1da1f2;
        }
    }
}
View Compiled
const $ = (s, o = document) => o.querySelector(s);
const $$ = (s, o = document) => o.querySelectorAll(s);

$('.restart').addEventListener('click', e => {

    e.preventDefault();
    
    $$('.loading').forEach(elem => {
        elem.parentNode.replaceChild(elem.cloneNode(true), elem);
    });

});

External CSS

  1. https://fonts.googleapis.com/css?family=Roboto:400,500,700&amp;display=swap

External JavaScript

This Pen doesn't use any external JavaScript resources.