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// PImage img;

PGraphics pg1, pg2;

​

void setup() {

  fullScreen();

  // img = loadImage('https://hips.hearstapps.com/hmg-prod.s3.amazonaws.com/images/face-wash-2-1561136582.jpg');

  pg1 = createGraphics(width,height);

  pg2 = createGraphics(width,height); 

  background(0);

}

​

void drawPG(){

  pg1.beginDraw();

  pg1.loadPixels();

​

  pg2.beginDraw();

  pg2.loadPixels();

​

  // For every x,y coordinate in a 2D space, calculate a noise value and produce a brightness value

  for (int x = 0; x < width; x++) {

    for (int y = 0; y < height; y++) {

      float bright = random(1)

      // Set each pixel onscreen to a grayscale value

      pg1.pixels[x+y*width] = color(bright > .5 ? 255 : 0);

      pg2.pixels[x+y*width] = color(bright > .5 ? 0 : 255);

    }

  }

  pg1.updatePixels();

  pg1.endDraw();

  pg2.updatePixels();

  pg2.endDraw();

}

​

void draw() {

  drawPG();

  pg2.blend(pg1, 0, 0, width, height, 0, 0, width, height, ADD);

  image(pg2,0,0);

}