.main
    each _ in Array(15)
        .plane
            .triangle

div(class='inspiration')
    a(class='inspiration__link' href='https://dribbble.com/shots/5582653-Triangles' target='_blank' rel='noreferer') https://dribbble.com/shots/5582653-Triangles

$background_color: #000;
$secondary_color: #fff;
$item_count: 15;
$border_radius: 45%;
$multiplier: 0.75;
$time: 2.5s;
$delta: 0.045;

.plane {
    display: block;
    height: 0;
    width: 0;
    overflow: visible;
    transform-origin: 50% 50%;
    transform: rotateZ(0deg) translate(-50px, 0);
    -webkit-animation: spin $time ease-in-out alternate infinite;
    -moz-animation: spin $time ease-in-out alternate infinite;
    -o-animation: spin $time ease-in-out alternate infinite;
    animation: spin $time ease-in-out alternate infinite;

    &:nth-of-type(odd) .triangle {
        background-color: $secondary_color;
    }

    &:nth-of-type(even) .triangle {
        background-color: $background_color;
    }
}

.triangle {
    position: absolute;
    border-top-right-radius: $border_radius;
    transform-origin: -50% 50%;
    transform: rotateZ(-60deg) skewX(-30deg) scale(1, 0.866);

    &:before,
    &:after {
        content: "";
        position: absolute;
        background-color: inherit;
        border-top-right-radius: $border_radius;
    }

    &:before {
        box-shadow: -6px -5px 10px 3px rgba($background_color, 0.075);
        -webkit-transform: rotate(-135deg) skewX(-45deg) scale(1.414, 0.707) translate(0, -50%);
        -moz-transform: rotate(-135deg) skewX(-45deg) scale(1.414, 0.707) translate(0, -50%);
        -ms-transform: rotate(-135deg) skewX(-45deg) scale(1.414, 0.707) translate(0, -50%);
        -o-transform: rotate(-135deg) skewX(-45deg) scale(1.414, 0.707) translate(0, -50%);
        transform: rotate(-135deg) skewX(-45deg) scale(1.414, 0.707) translate(0, -50%);
    }

    &:after {
        box-shadow: 14px -1px 10px -6px rgba($background_color, 0.075);
        -webkit-transform: rotate(135deg) skewY(-45deg) scale(0.707, 1.414) translate(50%);
        -moz-transform: rotate(135deg) skewY(-45deg) scale(0.707, 1.414) translate(50%);
        -ms-transform: rotate(135deg) skewY(-45deg) scale(0.707, 1.414) translate(50%);
        -o-transform: rotate(135deg) skewY(-45deg) scale(0.707, 1.414) translate(50%);
        transform: rotate(135deg) skewY(-45deg) scale(0.707, 1.414) translate(50%);
    }
}

@for $i from 1 through $item_count {
    .plane:nth-of-type(#{$i}) {
        z-index: $item_count - $i;
        animation-delay: ($i * $delta) + s;
    }

    .plane:nth-of-type(#{$i}) .triangle,
    .plane:nth-of-type(#{$i}) .triangle:before,
    .plane:nth-of-type(#{$i}) .triangle:after {
        $size: ($i * $multiplier) + em;
        width: $size;
        height: $size;
    }
}

@keyframes spin {
    0% {
        -webkit-transform: rotateZ(0deg) translate(-50px, 0);
        -moz-transform: rotateZ(0deg) translate(-50px, 0);
        -o-transform: rotateZ(0deg) translate(-50px, 0);
        transform: rotateZ(0deg) translate(-50px, 0);
    }
    100% {
        -webkit-transform: rotateZ(120deg) translate(-50px, -80px);
        -moz-transform: rotateZ(120deg) translate(-50px, -80px);
        -o-transform: rotateZ(120deg) translate(-50px, -80px);
        transform: rotateZ(120deg) translate(-50px, -80px);
    }
}

//
// Inspiration snippet
//

.inspiration {
    display: block;
    position: fixed;
    height: 30px;
    bottom: 0;
    left: 0;
    z-index: 2;

    &__link {
        display: block;
        cursor: pointer;
        padding: 0 10px;
        line-height: 30px;
        background-color: #34363f;
        color: #fff;
        border-top-right-radius: 4px;
        font-size: 12px;
    }
}

//
// Page Default Styles
//

* {
    margin: 0;
    padding: 0;
    border: 0;
    outline: none;
    box-sizing: border-box;
}

html,
body {
    display: block;
    position: fixed;
    height: 100vh;
    width: 100vw;
    background-color: $background_color;
    background: linear-gradient(#1f1f21, $background_color);
}

.main {
    display: flex;
    height: 100vh;
    width: 100vw;
    flex-wrap: wrap;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}