createCanvas(400, 400);

}

​

function draw() {

  background(220);

  //coordinates of the four corners

  textAlign(LEFT, TOP);

  text("x=0, y=0", 0, 0);

​

  textAlign(RIGHT, TOP);

  text("x=400, y=0", 400, 0);

​

  textAlign(LEFT, BOTTOM);

  text("x=0, y=400", 0, 400);

  textAlign(RIGHT, BOTTOM);

  text("x=400, y=400", 400, 400);

  //lines across the x axis and the y axis

  line(0, height / 2, width, height / 2);

  line(width / 2, 0, width / 2, height);

}

​