Trying to make a random treasure chest (With minor change to image)

Hi everyone,  I'm attempting to do two things: 1) Use a rollable table to randomly generate treasure from a chest. 2) Let the players use a macro to 'open' a chest, switching the picture from a closed treasure chest to open treasure chest. I feel like this should be something that I should just be able to do- but I'm imaging I'm going to need API script for this (The wonders of Roll20 am-i-rite?) Any advice is crazy helpful, thanks! 

You can switch the image on a token using TokenMod .  RecursiveTable would be useful for doing treasure rolls.

Idk how to install the token mod

Both are in the 1-click API Scripts dropdown.  You can go to the API Scripts page in your Game, then select and install them.

Here's a short, helpful video: How to Install Roll20 API Scripts

Oh. I thought one was only on git or whatever that program site is. 

You can get the code from git (or the forums, or anywhere, really) if you prefer, but using One Click ensures that you automatically receive updates to installed scripts. Manually entered scripts must be updated manually.