createCanvas(400, 400);

}

​

function draw() {

  background(255);

​

  // Draw a black outlined square

  stroke(0);

  noFill();

  rect(100, 100, 200, 200);

​

  // Draw a red horizontal line from the midpoint of the left side toward the middle of the right side

  stroke(255, 0, 0);

  line(100, 200, 300, 200);

}

​