title: Overlay grid on responsive image
body: <p>I have a standard image (that is responsive because of bootstap) and would like to overlay a standard grid 5% x 5% on top of it.</p>
  
  <p>I need to pick points on the images and need the grid to be visible as well as the image. </p>
  
  <p>I upload the image via form and it show up in a form location on the html. I would like to know how to add additional css on top it - to get the grid on top it.</p>
  
  <p>See the image below for a sample (I only put 8 grid - but I would like 5% spacing or 10% spacing both x and y).</p>
  
  <p><a href="https://i.stack.imgur.com/riXz4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/riXz4.png" alt="enter image description here"></a></p>