<svg id="svg" viewBox="0 0 100 100">
  <circle cx="50" cy="50" r="1" fill="white" stroke="black"></circle>
</svg>

#svg {
  width: 100%;
  height: 100%;
  background: #eee;
}
body {
  margin: 0;
  height: 100vh;
}

line {
  transform-origin: center;
  animation: do 4s infinite alternate;
}
line:nth-child(6n) {
  animation-delay: -1s;
}
line:nth-child(6n + 1) {
  animation-delay: -2s;
}
line:nth-child(6n + 2) {
  animation-delay: -3s;
}
line:nth-child(6n + 3) {
  animation-delay: -4s;
}
line:nth-child(6n + 4) {
  animation-delay: -5s;
}

@keyframes do {
  100% {
    transform: scale(0.69);
  }
}

const getRandomInt = (min, max) => {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min + 1)) + min;
};

const NUM_LINES = 69;
const svg = document.querySelector("#svg");

const doArt = () => {
  // Clear old
  let oldLines = svg.querySelectorAll("line");
  if (oldLines) oldLines.forEach((line) => line.remove());

  // Draw new
  let newLines;
  for (let i = 0; i < NUM_LINES; i++) {
    newLines += `
    <line 
      x1="50"
      y1="50" 
      x2="${getRandomInt(10, 90)}"
      y2="${getRandomInt(10, 90)}"
      stroke="rgba(0, 0, 0, 0.${getRandomInt(0, 25)})"
      stroke-linecap="round"
      stroke-width="${getRandomInt(1, 2)}"
    />`;
  }

  svg.insertAdjacentHTML("afterbegin", newLines);
};

doArt();

window.addEventListener("click", doArt);