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HTML 

              
                %h1 DAN <br>FLASHES<span>Complicated Shirts <br>for Complicated Gentlemen</span>
%span fetching new shirts
%strong click for new shirt
#pattern
 -64.times do
  .cell
   %svg{:viewbox => "0 0 400 400", :xmlns => "http://www.w3.org/2000/svg"}
    %path.cellsvg1{ :stroke => "#FF0066", :fill => "transparent"}
    %path.cellsvg2{ :stroke => "#FF0066", :fill => "transparent"}
!

CSS 

              
                @import url("https://fonts.googleapis.com/css2?family=Playfair+Display:[email protected]&display=swap");

body {
  font-family: "Playfair Display", serif;
  background: #fff;
  height: 100vh;
  --cellcount: 10;
  overflow: hidden;
  cursor: pointer;
  * {
    cursor: pointer;
  }
  transform: scale(0.75);
  @media (max-width: 1000px) {
    transform: scale(0.5);
  }
  &:before,
  &:after {
    content: "";
    position: absolute;
    width: 900px;
    height: 900px;
    left: calc(50% - 450px);
    top: calc(50% - 450px);
    box-shadow: inset 0 0 0 25px #f0e6d2, inset 0 0 0 26px #fff,
      0 40px 60px -40px rgba(0, 0, 0, 0.25);
    background: radial-gradient(
      circle at center,
      lighten(#f0e6d2, 5%),
      #f0e6d2 90%
    );
  }
  &:after {
    background: transparent;
    z-index: 999;
    box-shadow: 0 40px 60px -40px rgba(0, 0, 0, 0.25), 0 0 0 125vw #fff;
  }
  h1 {
    position: absolute;
    z-index: 1;
    color: #222;
    font-weight: 900;
    font-size: 40px;
    display: inline-block;
    left: calc(50% - 250px);
    top: calc(50% - 350px);
    transform: translate(-50%, -50%);
    transition: 1s ease-in-out;
    transition-delay: 0.5s;
    span {
      font-size: 20px;
      color: #666;
      display: block;
      margin-top: 0.15rem;
    }
  }
  > span {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    color: #222;
    font-size: 12px;
    transition: opacity 0.5s ease-in-out;
    opacity: 0;
    &:before {
      content: "(complicated shirts take time)";
      position: absolute;
      left: 50%;
      top: 125%;
      transform: translateX(-50%);
      width: 300px;
      text-align: center;
      opacity: 0.5;
    }
    &:after {
      content: ".....";
      animation: loading 2s linear infinite;
      position: absolute;
      left: 100%;
      clip-path: polygon(0 0, 0 0, 0 100%, 0% 100%);
      @keyframes loading {
        100% {
          clip-path: polygon(0 0, 100% 0, 100% 100%, 0% 100%);
        }
      }
    }
  }
  > strong {
    position: absolute;
    z-index: 10;
    top: calc(50% + 400px);
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 1;
    transition: 0.5s ease-in-out;
    transition-delay: 2s;
  }
  &.loading {
    > strong {
      opacity: 0;
      transition-delay: 0s;
    }
    > span {
      opacity: 1;
    }
    canvas {
      transform: translateY(clamp(800px, 100vh, 90000px));
    }
  }
  canvas {
    z-index: 2;
    position: relative;
    transition: transform 1s cubic-bezier(0.175, 0.885, 0.32, 1.075);
    filter:contrast(calc(1 + (var(--contrast)/7)));
  }
  #pattern {
    overflow: hidden;
    position: absolute;
    width: 1200px;
    height: 1200px;
    left: -2400px;
    top: 0;
    z-index: 999;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-template-rows: repeat(8, 1fr);
    grid-column-gap: 0px;
    grid-row-gap: 0px;
    z-index: -1;
    &:before {
      content: "";
      position: absolute;
      width: 100%;
      height: 100%;
      left: 0;
      top: 0;
      z-index: 10;
      background: linear-gradient(
          to left,
          var(--color1),
          transparent,
          var(--color1)
        ),
        linear-gradient(to bottom, var(--color2), transparent, var(--color2));
    }
    .cell {
      background: transparent;
      position: relative;
      z-index: -1;
      background: radial-gradient(
          circle at center,
          var(--color1) 15px,
          transparent 5px
        ),
        linear-gradient(
          var(--rotate2),
          transparent 50%,
          var(--color0) 50%,
          var(--color4) 100%
        ),
        linear-gradient(var(--rotate2), var(--color2), transparent);
      background-position: calc(var(--rotate) * 0.5px)
          calc(var(--rotate) * 0.5px),
        calc(var(--rotate) * 2px) calc(var(--rotate) * 2px);
      &:before,
      &:after {
        content: "";
        position: absolute;
        width: 100%;
        height: 100%;
        border-radius: 100%;
        background: linear-gradient(45deg, var(--color6), var(--color7));
        transform: scale(calc(1 - (var(--scale) / 4)));
      }
      &:after {
        background: radial-gradient(
          circle at bottom,
          transparent 25%,
          var(--color8) 25%,
          var(--color8) 35%,
          transparent 35%
        );
        border-radius: 0px;
        transform: scale(calc(var(--scale) / 10)) rotate(var(--rotate2));
      }
      svg {
        position: absolute;
        width: 100%;
        height: 100%;
        left: 0;
        top: 0;
        z-index: 2;
        background: radial-gradient(
              circle at center,
              var(--color1) 2px,
              transparent 2px,
              transparent
            )
            50% 50% / calc(var(--distance2) * 1px) calc(var(--distance2) * 1px),
          repeating-linear-gradient(
            var(--rotate2),
            var(--color5) 1px,
            transparent 1px,
            transparent calc(var(--distance) * 1px),
            var(--color5) calc(var(--distance) * 1px),
            var(--color5) calc((var(--distance) * 1px) + 1px)
          ),
          repeating-linear-gradient(
            calc(var(--rotate2) * 90),
            var(--color5) 1px,
            transparent 1px,
            transparent 5px,
            var(--color5) 5px,
            var(--color5) 6px
          );
        path {
          stroke-width: var(--stroke);
          stroke: var(--color3);
        }
      }
    }
  }
}
!

JS 

              
                var imageURL;
var shirt;
var colors = ["", "", "", "", "", "", "", "", ""];
var img = "";
var paths1 = [
  "M 200 400 C 200 310 190 280 260 200 C 330 140 310 210 400 200 ",
  "M 200 400 C 200 310 190 280 290 310 C 390 340 310 190 400 200 ",
  "M 200 400 C 200 330 150 330 230 290 C 370 220 210 80 130 160 Q 30 260 160 310 C 290 390 210 190 400 200 "
];
var paths2 = [
  "M 0 200 C 180 190 190 280 230 230 C 260 180 190 150 200 0 ",
  "M 0 200 C 90 210 60 160 160 200 C 310 250 210 100 200 0 ",
  "M 0 200 C 90 210 60 160 30 120 C 0 60 210 100 200 0 ",
  "M 0 200 C 90 210 20 310 100 280 C 310 250 210 100 130 160 Q 40 240 160 310 C 290 390 380 230 200 0 "
];
var pattern = document.getElementById("pattern");
document.body.classList.add("loading");
drawShirt();

function preload() {
  shirt = loadModel("https://assets.codepen.io/383755/shirt.obj", true);
}

function setup() {
  reset();
}

function reset() {
  createCanvas(windowWidth, windowHeight, WEBGL);
  img = loadImage(imageURL);
}

function draw() {
  background(255, 255, 255, 0);
  ambientLight(180);
  directionalLight(255, 255, 255, width / 2, height / 2, 0);
  rotateY(frameCount / 40);
  noStroke();
  rotateX(15.6);
  scale(2, 2, 2);
  model(shirt);
  texture(img);
  textureMode(IMAGE);
  textureWrap(CLAMP);
}

function windowResized() {
  resizeCanvas(windowWidth, windowHeight);
}

function drawShirt() {
  document.body.style.setProperty("--contrast", Math.floor(Math.random() * 10));
  pattern.style.setProperty("--cellcount", Math.floor(Math.random() * 3) + 7);
  pattern.style.setProperty("--stroke", Math.floor(Math.random() * 25) + 5);
  pattern.style.setProperty(
    "--color1",
    "rgba(" +
      Math.floor(Math.random() * 255) +
      "," +
      Math.floor(Math.random() * 255) +
      "," +
      Math.floor(Math.random() * 255) +
      "," +
      1 / (Math.floor(Math.random() * 5) + 1) +
      ")"
  );
  pattern.style.setProperty(
    "--color2",
    "rgba(" +
      Math.floor(Math.random() * 255) +
      "," +
      Math.floor(Math.random() * 255) +
      "," +
      Math.floor(Math.random() * 255) +
      "," +
      1 / (Math.floor(Math.random() * 5) + 1) +
      ")"
  );
  colors.forEach(function (part, index) {
    this[index] =
      "rgba(" +
      Math.floor(Math.random() * 255) +
      "," +
      Math.floor(Math.random() * 255) +
      "," +
      Math.floor(Math.random() * 255) +
      "," +
      1 / (Math.floor(Math.random() * 5) + 1) +
      ")";
  }, colors);
  document.querySelectorAll(".cell").forEach((cell) => {
    for (let i = 0; i < colors.length; i++) {
      cell.style.setProperty("--color" + i, colors[i]);
    }
    cell.style.setProperty("--rotate", Math.floor(Math.random() * 360) + 1);
    cell.style.setProperty(
      "--rotate2",
      Math.floor(Math.random() * 360) + 1 + "deg"
    );
    cell.style.setProperty("--scale", Math.floor(Math.random() * 5) + 1);
    cell.style.setProperty("--scale2", Math.floor(Math.random() * 5) + 1);
    cell.style.setProperty("--distance", Math.floor(Math.random() * 25) + 10);
    cell.style.setProperty("--distance2", Math.floor(Math.random() * 25) + 10);
  });

  document.querySelectorAll(".cellsvg1").forEach((svg) => {
    svg.setAttribute("d", paths1[Math.floor(Math.random() * 3) + 0]);
  });

  document.querySelectorAll(".cellsvg2").forEach((svg) => {
    svg.setAttribute("d", paths2[Math.floor(Math.random() * 4) + 0]);
  });
  html2canvas(document.getElementById("pattern"), {
    useCORS: true
  }).then(function (canvas) {
    imageURL = canvas.toDataURL("image/jpg");
  });
}

document.addEventListener(
  "click",
  function (event) {
    document.body.classList.add("loading");
    drawShirt();
    setTimeout(() => {
      reset();
      document.body.classList.remove("loading");
    }, 1000);
  },
  false
);

window.addEventListener(
  "load",
  function (event) {
    drawShirt();
    setTimeout(() => {
      reset();
      document.body.classList.remove("loading");
    }, 5000);
  },
  false
);
!
999px

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