let cat;

let myImage;

​

//anything you want to include from the cloud/elsewhere

function preload() {

  cat = loadImage("cat.jpg");

}

function setup() {

  background('red');

  createCanvas(cat.width, cat.height);

  pixelDensity(1);

  //create an empty p5 iamge

  myImage = createImage(width, height);

  cat.loadPixels();

  myImage.loadPixels();

  for (let i = 0; i < myImage.pixels.length; i++) {

    //red

    myImage.pixels[i] = cat.pixels[i];

   //green

    myImage.pixels[i + 1] = cat.pixels[i + 1];

    //blue

    myImage.pixels[i + 2] = cat.pixels[i + 2];

    //alpha

    myImage.pixels[i + 3] = cat.pixels[i];

  }

​

  //erase the middle line code

  for(let c = 135*cat.width*4 ; c<136*cat.width*4; c++){

    myImage.pixels[c]=0

  }

  //get and set

  // for(x=0;x<width; x++){

  //   myImage.set(x,height/2, [0,0,0,0]);

  // }

  function draw() {

    // background(220);

    //image(cat, 0, 0);

    //green

    // myImage.pixels[i + 1] = cat.pixels[i + 1];

    //blue

    // myImage.pixels[i + 2] = cat.pixels[i + 2];

    //alpha

    // myImage.pixels[i + 3] = cat.pixels[i];

  }

  myImage.updatePixels();

  image(myImage, 0, 0);

}

​