Sketch of https://www.reddit.com/r/generative/comments/j3r1vd/processing_boxes_and_irregularities/

boxes_and_irregularities.pde

int grid=7;
float size=60;

float h_grid=float(grid)/2;
boolean[][] drawn;
color color_burn(color a, color b) {
  return color(255-(255-red(b))/red(a)*255,255-(255-green(b))/green(a)*255,255-(255-blue(b))/blue(a)*255);
}

void setup() {
  drawn = new boolean[grid+1][grid+1];
  
  // init
  size(1000,1000);
  clear();
  background(255);
  colorMode(RGB);
  
  // paper texture
  
  noiseDetail(10,0.75);
  loadPixels();
  for (int x = 0;x < width;x++) {
    for (int y = 0;y < height;y++) {
      float bright = noise(x*0.02, (y-x*0.7)*0.02) * 200 * min(float(min(x, height-x)*4 + height / 4)/height, float(min(y, width-y)*4 + width / 4)/width,1.1);
      if (random(1.) < 0.25) { bright = bright * random(0.75,1.); }
      pixels[x+y*width] = color_burn(color(bright),#FEF5E8);
    }
  }
  updatePixels(); 
  
  translate(width/2,height/2);
  noStroke();
  
  // links
  for(int x=0;x<=grid;x++) {
    for(int y=0;y<=grid;y++) {
  
      // colors
      if (random(1.) > 0.4) {
        colorMode(HSB);
        fill(random(255.),120.,200.);
      } else {
        colorMode(RGB);
        fill(0);
      }
      boolean dir = random(1.)>.5;
      int len = floor(random(6.)*random(6.)/6.+.5);
      
      if(!drawn[x][y]) {
        drawn[x][y] = true;
        
        
        int fin = 0;
        for(int off=0; off < len && !(drawn[min(x+(dir?off+1:0),grid)][min(y+(dir?0:off+1),grid)] | x+(dir?off+1:0) > grid | y+(dir?0:off+1) > grid); off++) {
          int xx = x+(dir?off:0);
          int yy = y+(dir?0:off);
          drawn[min(xx,grid)][min(yy,grid)] = true;
          fin = off + 1;
        }
        
        int xx = x+(dir?fin:0);
        int yy = y+(dir?0:fin);
        
        beginShape();
        vertex((x-h_grid)*size-size/3+random(-(size/10),size/10),(y-h_grid)*size-size/3+random(-(size/10),size/10));
        vertex((x-h_grid)*size-size/3+random(-(size/10),size/10),(yy-h_grid)*size+size/3+random(-(size/10),size/10));
        vertex((xx-h_grid)*size+size/3+random(-(size/10),size/10),(yy-h_grid)*size+size/3+random(-(size/10),size/10));
        vertex((xx-h_grid)*size+size/3+random(-(size/10),size/10),(y-h_grid)*size-size/3+random(-(size/10),size/10));
        drawn[min(xx,grid)][min(yy,grid)] = true;
        endShape();
      }
    }
  }
  
  saveFrame("png.png");
}