function setup() {

  createCanvas(600, 600); 

  fill(0,0,0)

  rect(200,200,200,200);

}



function draw() {

   stroke(0,0,0)

   line(random(300, 600), 0, 600, 600);

   line(random(300, 0), 600, 0, 0);

   stroke(255,255,255)

   line(random(400, 300), 400, 400, 200);

   line(random(200, 300), 200, 200, 400);

   strokeWeight(1);

}