let sprites = [];

//let direction = 0; // 0 up

let step = 0;

let x;

let y;

let speed = 7;

​

function preload() {

  spritesheet = loadImage("runningcat.png");

}

​

function setup() {

  createCanvas(1000, 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 emoty 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 store in the array

     // sprites[y][x] = spritesheet.get(x * w, y * h, w, h);

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

    }

  }

​

  x = width / 2;

  y = height / 2;

​

  // imageMode(CENTER);

}

​

function draw() {

  background(255);

​

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

  if (isKeyPressed == true) {

    if (keyCode == RIGHT_ARROW) {

    //  direction = 0;

      x += speed;

    }

    if (keyCode == RIGHT_ARROW) {

 //     direction = 1;

      x += speed;

    }

    if (keyCode == RIGHT_ARROW) {

  //    direction = 2;

      x += speed;

    }

    if (keyCode == RIGHT_ARROW) {

     // direction = 3;

      x += speed;

    }

​

    if (keyCode == LEFT_ARROW) {

     // direction = 0;

      x -= speed;

​

      if (keyCode == LEFT_ARROW) {

       // direction = 1;

        x -= speed;

      }

​

      if (keyCode == LEFT_ARROW) {

      //  direction = 2;

        x -= speed;

      }

​

      if (keyCode == LEFT_ARROW) {

       // direction = 3;

        x -= speed;

      }

    }

​

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

    // use modulo to loop the animation

    if (frameCount % speed == 0) {

      step = (step + 1) % 8;

    }

  }

​

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

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

  image(sprites[step], width/2, y);

}

​