Static screen like old TV Twitter size code

staticScreen.pde

//https://twitter.com/VolfeganGeist/status/1241962067109838848
int n, x, y, X, Y, w=720;
void setup() {
  size(720, 720);
}
void draw() {
  background(0);
  loadPixels();
  X=0;
  Y=0;
  for (y=0; y<w; y+=2) {
    X+=n;
    n=int(noise(X, Y)*255);
    if (n<9)continue;
    for (x=0; x<w; x++) {
      if (random(1)>.7) {
        pixels[y*w+x]=color(n);
      }
      Y+=int(random(n));
    }
  }
  updatePixels();
}