Mirrored

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(255);

}

​

//pen 

  function draw() {

    if (mouseIsPressed) {

      if (mouseButton == LEFT) {

      noStroke();

      fill(232,0,2);

      ellipse(mouseX,mouseY,15,15);

      fill(0,234,233);

      ellipse(mouseY,mouseX,15,15);

    }

    //eraser  

      if (mouseButton == RIGHT) {

        fill(255);

        ellipse(mouseX,mouseY,15,15);

      }

    }

  }