Vasarely Painting - OpenProcessing

mySketch
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/*-----------------------------
VASARELY's Painting
​
Created 2 Feb 2017
By Tamara Sabbagh
tamara.sabbagh@gmail.com
Modified 7 Feb 2017
By Tamara Sabbagh
​
https://www.openprocessing.org/sketch/404607
-----------------------------*/
​
​
size(500, 200);
for (int i = 25; i <500; i = i+50){
  for (int j = 25; j < 250; j = j+50) {
​
    fill(random(255), random(255), random(200)); //random colored squares
    rect(i-25, j-25, 50, 50);
    
    noStroke(); //take out ellipse outline
    fill(255);
  ellipse(i, j, random(5, 50), random(5, 50)); //random w, h
  }
}