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PGraphics pg;

int kernel[][];

​

float noiseValX = 0.02;

float noiseValY = 0.02;

​

void setup() {

  size(600, 600);

  pg     = createGraphics(600, 600, P2D); 

  kernel = new int[3][3];

}

​

​

void draw() {

  pg.beginDraw();

  pg.loadPixels();

  pg.fill(0);//, 20);

  pg.rect(0, 0, width, height);

  pg.updatePixels();

  pg.endDraw();

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

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

      int index = x + y*pg.width;

      float mg = mag(x - width/2, y - height/2);

      pg.pixels[index] = color(0, mg*noise(noiseValY)*2.1,  mg*1.5, 10);//color( , noise(noiseValY)*100);

      noiseValX += 0.03;

    }

    noiseValY += 0.02;

  }

  image(pg, 0, 0, width, height); 

}

​