9 lines, no comments · 516 tokens, written in 7 seconds for $0.0014

1  function setup() {
2    createCanvas(400, 400);
3  }
4  
5  function draw() {
6    background(220);
7    let size = 100 + sin(frameCount * 0.05) * 50;
8    ellipse(width/2, height/2, size, size);
9  }