Can anyone help me with a dice system?

Hello,  We are from Sweden and playing a game called EON.  The system uses d6 where every rolled 6 is rerolled with one additional dice. This means that each rolled 6 is removed and replaced with two new d6. I see that roll20 has some advanced sets where this is somewhat used, but not exactly in this way. Does anyone have the knowledge how this would be achieved? Example on dice rolls: If you roll a: 2, 4, 2 = equals 8 if you roll a: 2, 4, 6 -> 2, 4 + 2d6 -> 2, 4, 5, 2 if you roll a: 2, 6, 6 -> 2 + 4d6 -> 2, 4, 5, 1, 6 -> 2, 4, 5, 1 +2d6 -> 2, 4, 5, 1, 1, 4 = 17

That won't be possible to automate without the API, a Pro Subscriber Perk.

Would it not be possible using attached rolls and crit checking, where you attach a roll of [[2d6]] which you click for how ever many 6's there are? You'd have to add them up yourself still

There are definitely things you could do to make it easier, like using a rollable table with values 1,2,3,4,5,"add 2d6" so that the total is right and the output tells you to roll some more.

Ok, thanks a lot guys =)