let x = 0;

let y = 0;

​

function setup() {

  createCanvas(400, 400);

  background(0,0,0);

}

​

function draw() {

  let randomNumber = random();

  // background(0);

  strokeWeight(2);

  stroke("#FF00D7");

  //line(x1, y1, x2, y2); 

  if(randomNumber > 0.5){

      // \line

  line(x,y,x+space,y+space);

  }else{

    // /line

  line(x,y+space,x+space,y);

  }

  if(x < width){

    x = x + space;

  } else {

    x = 0;

    y = y + space;

  }

  if(y > height){

    noLoop();

  }

  // text('x:'+mouseX+"- y:"+mouseY,mouseX,mouseY);

}