Image generated dynamically from image-checkboxes

Hi,
I’d like to ask you if the following situation is possible and how can I achieve that:

Check the following image: https://www.w-3.gr/img/possible.png

I want for the user to be able to choose 1)A color base and then 2) From 1 up to 3 Stone colors and as a result – when clicking on “Calculate Now” get an image with the result of 1) & 2) dynamically.
I ask that, ’cause the possibilities are way too much, in order to design all of the possible combinations in various png images.

Is there a way?

Thank you in advance,
A.

The page I need help with: [log in to see the link]