Based on Daniel Shiffman's Random Walker

http://codingtra.in

https://youtu.be/l__fEY1xanY

https://thecodingtrain.com/CodingChallenges/052-random-walk.html

​

See also Introduction to the Nature of Code v2.0 by Daniel Shiffman:

https://drive.google.com/file/d/1G_16tPKByN9ya6l2Ws58X-OJK1yex9IX/view

*/

​

let x, y;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

  stroke(255);

  strokeWeight(4);

  x = width / 2;

  y = height / 2;

}

​

function draw() {

  point(x, y);

​

  let randomNum = floor(random(4));

​

  if (randomNum == 0) {

    x += 4;

  } else if (randomNum == 1) {

    x -= 4;

  } else if (randomNum == 2) {

    y += 4;

  } else {

    y -= 4;

  }

​

  if (x > width || x < 0) {

    x = width / 2;

  }

​

  if (y > height || y < 0) {

    y = height / 2;

  }

}

​

function windowResized() {

  resizeCanvas(windowWidth, windowHeight);

  background(0)

}

​

function mousePressed(){

  background(0)

  x = mouseX;

  y = mouseY

}

​