Based on Daniel Shiffman's implementation of code for the Commodore 64:

10 PRINT CHR$(205.5+RND(1)); : GOTO 10

​

Coding Train Coding Challenge #76: 10PRINT in p5.js

https://www.youtube.com/watch?v=bEyTZ5ZZxZs

*/

​

let x, y, spacing;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  stroke(255);

  strokeWeight(2);

  initialize();

}

​

function initialize() {

  background(0);

  x = 0;

  y = 0;

  spacing = min(width / 20, height / 20); //determines the smallest number within the min() function and seperates the canvas into that many sections

}

​

function draw() {

  if (random(1) > 0.5) { //develops a function that occurs 50% of the time for one part and 50% of the time for the second part

    line(x, y, x + spacing, y + spacing); //draws a line that starts at the original x and y and ends at the x and y plus the spacing variable

  } else {

    line(x, y + spacing, x + spacing, y);// draws a line at the original x coordinate, the y coordinate plus the spacing, and ends at the x coordinate plus the spacing and the original y coordinate

  }

​

  x += spacing; //moves the x position to the next sextion of the screen based on the spacing

​

  if (x > width) { //once the x position moves to the end of the screen, this function runs

    x = 100;

    y += spacing;

  } //once the lines get to the right end of the screen, the lines start again in the next row determined on the spacing

​

  if (y > height) {

    background(0);

    x = 0;

    y = 0;

  } //once the lines reach the bottom of the screen, the design starts over

}

​

function windowResized() {

  resizeCanvas(windowWidth, windowHeight);

  initialize(); //if the window is resized then the x and y positions are reset and the design starts again

}

​