<div class="triangles">
    <div class="triangle"></div>
    <div class="triangle"></div>
    <div class="triangle"></div>
    <div class="triangle"></div>
</div>

* {
    box-sizing: border-box;
}

html, body {
    height: 100vh;
    min-height: 100vh;
    overflow: hidden;
}

html {
    mix-blend-mode: overlay;
    background-image: linear-gradient(
        to bottom,
        rgba(#ddd, 0.03) 0%,
        transparent 100%
    );
    background-size: 50px 50px;

    &:after {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        bottom: 0;
        right: 0;
        background-image: url(http://api.thumbr.it/whitenoise-100x100.png);
        mix-blend-mode: multiply;
        pointer-events: none;
        opacity: 0.4;
        z-index: 10;
    }
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: linear-gradient(
        to bottom right,
        rgba(#da5a56, 0.9) 0%,
        rgba(#2f5056, 0.8) 60%
    );

    &:before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        bottom: 0;
        right: 0;
        mix-blend-mode: lighten;
        border: 20px solid rgba(#2b2b2b, 0.3);
    }
}

.triangles {
    position: relative;
    height: 350px;
    width: 400px;

    &:hover {
        .triangle:not(:nth-child(4)) {
            transform: translateX(13px) translateY(-10px) scale(.71);
        }
    }
}

.triangle {
    position: absolute;
    top: 0;
    left: 0;
    height: 0;
    width: 0;
    width: 400px;
    height: 350px;
    z-index: 1;
    background-image: linear-gradient(to bottom right, #fefefe 0%, #36a6ca 60%);
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
    mix-blend-mode: screen;
    opacity: 0.7;
    transition: 400ms ease transform;
    transform-origin: 50% 50%;

    &:nth-child(1) {
        transform: translateY(-60px) translateX(30px);
    }

    &:nth-child(2) {
        transform: translateY(-20px) translateX(-20px);
    }

    &:nth-child(3) {
        transform: translateY(10px) translateX(30px);
    }

    &:nth-child(4) {
        mix-blend-mode: normal;
        background-image: linear-gradient(
            to bottom right,
            rgba(#da5a56, 0.9) 0%,
            rgba(#2f5056, 0.8) 60%
        );
        border-left: 0;
        border-right: 0;
        border-bottom: 0;
        width: 288px;
        height: 251px;
        transform: translateX(69px) translateY(39px);
        clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
        z-index: 10;
    }
}