10 lines, 1 of them comments · 119 tokens, written in 21 seconds for $0.0001

 1  function setup() {
 2    createCanvas(400, 400);
 3    background(220);
 4  }
 5  
 6  function draw() {
 7    // Draw a circle that follows the mouse
 8    fill(255, 0, 0);
 9    ellipse(mouseX, mouseY, 50, 50);
10  }