let circleSize = 50;

let counter = 0;

​

function setup() {

  createCanvas(500, 500); // this is my canvas!

}

​

function draw() {

  //background(220);

  fillColor = color(255, 0, 0);

  fillColor.setAlpha(100);

  fill(fillColor);

  noStroke();

  circle(circleX, 250, circleSize);

}

​

function keyPressed() {

  circleX += 25;

  circleSize += 50;

  counter++;

​

  // save an image

  //saveCanvas("frame_" + counter, "png");

}

​