​

var inc = 0.1;

var length = 10;

var cols;

var rows;

var ioff = 0;

var joff = 0;

var koff = 0;

​

function setup() {

  createCanvas(720, 720);

  strokeWeight(0.5);

  cols = floor(width / length);

  rows = floor(height / length);

  refresh = true;

  // noLoop();

}

​

function draw() {

  if (refresh) {

    background(255, 250, 240);

    for (var i = 0; i < rows; i++) {

      joff = 0;

      for (var j = 0; j < cols; j++) {

        //generate smooth noise variable for hole

        var a = noise(joff, ioff);

        //generate vector lines

        var v = p5.Vector.fromAngle(random(PI));

        joff += inc;

        //decides where to put holes 

        if (a < 0.3) {

          erase = true;

        } else {

          erase = false;

        }

        //draw line if not called for hole

        if (!erase) {

          push(); //stores line

          translate(j * length, i * length);

          rotate(v.heading(PI));

          line(length, 0, -length / 2, 0);

          pop(); //erases line

        }

      }

      ioff += inc;

    }

  }

  refresh = false;

}

​

function mousePressed() {

  refresh = true;

}