var canvas = createCanvas(windowWidth, windowHeight);

  canvas.parent("p5container");

  background(255);

  textSize(320);

  textFont('Trebuchet MS');

}

​

function draw() {

  stroke(255);

    strokeWeight(3);

    fill (random(255), random(255), random(255));

 {

     //ellipse(windowWidth-mouseX, windowHeight-mouseY, 200, 200 );

     text('a', windowWidth-mouseX, windowHeight-mouseY);

  }

    stroke(255);

    strokeWeight(3);

        fill (0);

 {

     //ellipse(mouseX, mouseY, 200, 200 );

     text('z', mouseX, mouseY);

  }

}