random pattern - OpenProcessing

mySketch
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var grid = 40;
function setup() {
  createCanvas(400, 400);
  background(73, 255, 48);
  fill(0,0,0);
  strokeWeight(10);
  stroke(255,255,255);
  
  
  for (var r = 1; r < height/grid; r++) {
    for (var c = 1; c < width/grid; c++) {
      ellipse(c * grid, r * grid, 10, 10);
    }
  }
    for (var r = 1; r < width/grid; r++) {
    for (var c = 1; c < height/grid; c++) {
      
      var rnd = round(random(0, 2));
      print("my random number is "+rnd);
      
      if(rnd == 2) {
        noStroke();
        ellipse(c * grid, r * grid, 10, 10);
      }
      if(rnd == 2) {
        noStroke();
        rect(c * grid, r * grid, 10, 10);
      }
      
      if(rnd == 1) {
        strokeWeight(8);
        stroke(185, 56, 255);
        line (c * grid, r * grid, r * grid+grid, c * grid+grid);
      }  
    }
  }
}
​