So you need help with it? Well since im no redstone genius you can look it up in youtuber, I believe u will need a hopper, redstone, and mainly a redstone comparator. Also tagging some people who have these "hopper detecting grass" casinos, SakuraWolf and xXMospahXx
You can configure one of these payment systems to any stackable item. Ill include images and instructions below For both this system and the casino I used, I did use the design and redstone from a video, so creds to that! If you wanna see the video and follow that rather than my (rather bad) instructions, just pm me and I'll send you the video ;D
Does this Contain the Casino thing that happens in Your Island? (when you put the grass in and the there are random lights that appear) and how do i make it respond to dispensers if it got 3 lights for e.g.