Squares - OpenProcessing

mySketch
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void setup(){
size(500,500);
frameRate(10);
}
​
void draw(){
  for  (int  i  =  0;  i  <  200;  i  =  i+50)  {  
    for  (int  j  =  0;  j  <  200;  j  =  j+50)  {
      fill(random(200,255),(random(100,200)),random(150,200));
      colorMode(HSB);
      strokeWeight(random(0,.5));
      rect(i,j,55,55);;
     
    }
  }
    for  (int  i  =  200;  i  <  500;  i  =  i+50)  {  
    for  (int  j  =  0;  j  <  500;  j  =  j+50)  {
      strokeWeight(random(0,.5));
      rect(i,j,55,55);;
    }
    }
       for  (int  i  =  0;  i  <  500;  i  =  i+50)  {  
    for  (int  j  =  200;  j  <  500;  j  =  j+50)  {
      strokeWeight(random(0,.5));
      rect(i,j,55,55);;
    }
    }
     
}