Footer blobs #codepen

index.pug

div.main
div.footer
    div.bubbles
        - for (var i = 0; i < 128; i++) //Small numbers looks nice too
            div.bubble(style=`--size:${2+Math.random()*4}rem; --distance:${6+Math.random()*4}rem; --position:${-5+Math.random()*110}%; --time:${2+Math.random()*2}s; --delay:${-1*(2+Math.random()*2)}s;`)
    div.content
        div
            div
                b Eldew
                a(href="#") Secuce
                a(href="#") Drupand
                a(href="#") Oceash
                a(href="#") Ugefe
                a(href="#") Babed
            div
                b Spotha
                a(href="#") Miskasa
                a(href="#") Agithe
                a(href="#") Scesha
                a(href="#") Lulle
            div
                b Chashakib
                a(href="#") Chogauw
                a(href="#") Phachuled
                a(href="#") Tiebeft
                a(href="#") Ocid
                a(href="#") Izom
                a(href="#") Ort
            div
                b Athod
                a(href="#") Pamuz
                a(href="#") Vapert
                a(href="#") Neesk
                a(href="#") Omemanen
        div
            a.image(href="https://codepen.io/z-" target="_blank" style="background-image: url(\"https://s3-us-west-2.amazonaws.com/s.cdpn.io/199011/happy.svg\")")
            p ©2019 Not Really
svg(style="position:fixed; top:100vh")
    defs
        filter#blob
            feGaussianBlur(in="SourceGraphic" stdDeviation="10" result="blur")
            feColorMatrix(in="blur" mode="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 19 -9" result="blob")
            feComposite(in="SourceGraphic" in2="blob" operator="atop")

playground.json

{
  "scripts": [],
  "styles": [
    "https://fonts.googleapis.com/css?family=Open+Sans:400,700&display=swap",
    "https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.1/normalize.min.css"
  ]
}

style.scss

body {
    display:grid;
    grid-template-rows: 1fr auto;
    grid-template-areas:"main" "footer";
    overflow-x:hidden;
    background:#F5F7FA;
    min-height:100vh;
    font-family: 'Open Sans', sans-serif;
    .footer {
        z-index: 1;
        --footer-background:#ED5565;
        display:grid;
        position: relative;
        grid-area: footer;
        min-height:12rem;
        .bubbles {
            position: absolute;
            top:0;
            left:0;
            right:0;
            height:1rem;
            background:var(--footer-background);
            filter:url("#blob");
            .bubble {
                position: absolute;
                left:var(--position, 50%);
                background:var(--footer-background);
                border-radius:100%;
                animation:bubble-size var(--time, 4s) ease-in infinite var(--delay, 0s),
                    bubble-move var(--time, 4s) ease-in infinite var(--delay, 0s);
                transform:translate(-50%, 100%);
            }
        }
        .content {
            z-index: 2;
            display:grid;
            grid-template-columns: 1fr auto;
            grid-gap: 4rem;
            padding:2rem;
            background:var(--footer-background);
            a, p {
                color:#F5F7FA;
                text-decoration:none;
            }
            b {
                color:white;
            }
            p {
                margin:0;
                font-size:.75rem;
            }
            >div {
                display:flex;
                flex-direction:column;
                justify-content: center;
                >div {
                    margin:0.25rem 0;
                    >* {
                        margin-right:.5rem;
                    }
                }
                .image {
                    align-self: center;
                    width:4rem;
                    height:4rem;
                    margin:0.25rem 0;
                    background-size: cover;
                    background-position: center;
                }
            }
        }
    }
}

@keyframes bubble-size {
    0%, 75% {
        width:var(--size, 4rem);
        height:var(--size, 4rem);
    }
    100% {
        width:0rem;
        height:0rem;
    }
}
@keyframes bubble-move {
    0% {
        bottom:-4rem;
    }
    100% {
        bottom:var(--distance, 10rem);
    }
}