createCanvas(400, 400);

  background(220);

  strokeWeight(5); 

}

​

function draw() {

  print(frameCount); 

  stroke('red'); 

  ellipse( frameCount%width, 200, 100,100); 

  if (mouseIsPressed){

    stroke(0);

    line(pmouseX, pmouseY, mouseX, mouseY);

  }

}