function preload(){

  capture = loadImage('image1.png');  

}

function setup() {

  canvas = createCanvas(400, 400);

  capture = createCapture(VIDEO);

​

  let button = createButton('Save Pic');

  button.mousePressed(() => {

print('Button Pressed');

    slider = createSlider(0,255,0);

​

  // saveCanvas(canvas, 'myCanvas', 'jpg');

  }

​

​

function draw() {

  background(220);

  capture.loadPixels();

  for(let x = 0; x < capture.width; x++){

  for(let y = 0; y < capture.height; y++){

  let index = (x + y*capture.width)*4

  capture.pixels[index] = 1;

  let r = capture.pixels[index];

  let g = capture.pixels[index +1]

  let b = capture.pixels[index+2];

    let val= (r + g + b)/3 

    if(val > slider.value){

capture.pixels[index] = 0

capture.pixels[index +1] = avg

capture.pixels[index+2] = avg

    } else {

      capture.pixels[index] = 255

capture.pixels[index +1] =255

capture.pixels[index+2] = 255

  }

  }

  capture.updatePixels();

  image(capture, 0, 0, width, height); 

  // filter(GRAY);

  }