Using Pixelation technique to draw the image

PImage photo;
int curplace;
int numpixels;
int xpos;
int ypos;

void setup(){
 
photo=loadImage(“source.jpg”);
  size(photo.width,photo.height);
  numpixels=photo.width*photo.height;
  println(numpixels);
 
 
}

void draw(){
 
  //image(photo,0,0);
  random(numpixels);
  curplace=int(random(numpixels));
  for(int lop=0; lop<100; lop++){
   
   
   

 
 curplace=int(random(numpixels));
  color thiscol = photo.pixels[curplace];
  fill(red(thiscol),green(thiscol),blue(thiscol),60
  stroke(red(thiscol),green(thiscol),blue(thiscol),60);
 
 
  ypos=curplace/photo.width;  //gives how many rows in the image before the current line that we are on
  xpos=curplace-(ypos*photo.width);
 // rect(random(photo.width),random(photo.height),10,10);

  rect(xpos,ypos,10,10);
 
  }
}

);