roulette game site customize- simple html canvas

I want roulette game like that
https://preview.codecanyon.net/item/roulette-royale-html5-casino-game/full_screen_preview/17072843?_ga=2.98982174.1414062527.1624866092-447857035.1624610707
https://preview.codecanyon.net/item/3d-roulette-html5-casino-game/full_screen_preview/8315639?_ga=2.98982174.1414062527.1624866092-447857035.1624610707

but I need to change some features for this game. it is just html5 canvas, I think.
if you are ready, I will buy this game in the codecanyon.com and also will be provided what you have to change
thanks