​

let xOffset = 50;

let xSpacing = 60;

​

let yOffset = 50;

let ySpacing = 60;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  noLoop();

}

​

function draw() {

  background(220, 0, 150);

  noStroke();

​

  for (let xPos = xOffset; xPos <= width - xOffset; xPos += xSpacing) {

    for (let yPos = yOffset; yPos <= height - yOffset; yPos += ySpacing) {

      for (let vDiam = cDiam; vDiam >= 5; vDiam -= 10) {

        fill(4 * vDiam, xPos, yPos);

        ellipse(xPos, yPos, vDiam);

      }

    }

  }

}

​