createCanvas(400, 400);

}

​

function draw() {

  background(220);

  const maxDiameter = max(width, height);

  let shapeFraction = mouseX / width;

  shapeFraction = min(shapeFraction, 1);

  //let shapeFraction = map(mouseX, 0, width, 0, 1);

  print(shapeFraction);

  let circleDiameter = maxDiameter * shapeFraction;

  const xCircle = width / 2;

  const yCircle = height / 2;

  circle(xCircle, yCircle, circleDiameter);

}