var prev;

​

function setup() {

  createCanvas(400, 400);

  background(51);

  pos = createVector(200, 200);

  prev = pos.copy();

  console.log(pos); //so that we can check the calculation behind it

​

  // setting random colors to begin with

}

​

function draw() {

  strokeWeight(3);

  colorMode(RGB);

  stroke(random(255), random(255), random(255));

  line(pos.x, pos.y, prev.x, prev.y);

  prev.set(pos);

​

  var step = p5.Vector.random2D();

​

  var r = random(100); // setting probability

  if (r < 5) {

    step.mult(random(25, 50)); //enlargens the steps randomly from 25 to 50

  } else {

    step.setMag(2); //setting the magnitude

  }

​

  pos.add(step); //generates random vector steps

}

​