createCanvas(400, 400);

  strokeWeight(9);

  stroke(01, 67, 189);

}

function draw() {

  background(0);

  // If the 'A' key is pressed, draw a line

  if ((keyIsPressed == true) && (key == 'A')) {

    line(50, 25, 50, 75);

  }

  else { // Otherwise, draw an ellipse

    ellipse(100, 100, 50, 50);

  }

}