210414senbaku_san.js

function setup() {
  createCanvas(400, 400);
  angleMode(DEGREES);
}

function draw() {
  background(240);
  push();
  translate(0, height / 2);
  let px, py, x, y;
  x = 0;
  y = 0;
  px = x;
  py = y;
  while (x < width) {
    y = sin(x) * 50 * cos(frameCount);
    let n = noise(x / 400, y / 10, frameCount / 100);
    if (n > 0.5) {
      line(px, py, x, y);
    }
    px = x;
    py = y;
    x += 2;
  }
  pop();
}