let sprites = [];

let direction = 0; // 0 up

let step = 0;

let x;

let y;

let speed = 8;

​

function preload() {

  spritesheet = loadImage("runningcat.png");

}

​

function setup() {

  createCanvas(600, 600);

  imageMode(CENTER);

  // get the width and hieght of each sprite

  let w = spritesheet.width / 2;

  let h = spritesheet.height / 4;

​

  // there are four rows, create a for loop to iterate through them

  for (let y = 0; y < 4; y++) {

    // create another empty array for that row

    //sprites[y] = [];

    // there are 12 images in a row, iterate through them

    for (let x = 0; x < 2; x++) {

      // get the image subsection there and then stor in the array

      sprites.push(spritesheet.get(x * w, y * h, w, h));

    }

  }

​

  x = width / 2;

  y = height / 2;

}

​

function draw() {

  background(150, 50, 50);

  tint(50)

​

  //look at sprite sheet to determine which direction is which

  if (isKeyPressed == true) {

    // if (keyCode == DOWN_ARROW) {

    //   direction = 0;

    //   y+=speed;

    // }

    // if (keyCode == LEFT_ARROW) {

    //   direction = 1;

    //   x-=speed;

    // }

    if (keyCode == RIGHT_ARROW) {

      direction = 1;

      x += speed;

      if (frameCount % 8 == 0) {

        step = (step + 1) % 8;

      }

      // if (keyCode == UP_ARROW) {

      //   direction = 3;

      //   y-=speed;

    }

    // keep iterating through the sprites to make the animation happen

    // use modulo to loop the animation

  }

​

  // the first part choose the diretion (or row)

  // and the second part (the step) chooses the proper image from that row

  image(sprites[step], 250, 250);

}

​