Boss spawn structure help

Is it possible to make a when right-clicked on with item to change to a new one(I'm on vacation for about a month and a half and I'll return in a week. I just wanna know if it's possible because I'll create bosses for my mod which spawn from iron golem-like structures but from different materials and the middle block will be an inactive boss catalyst from different materials which when right clicked on with a key of the same material will change to the active catalyst which will spawn the boss) I also know a fair amount of javascript. But I want to know if it's possible with procedures, or instead I'll code it with Java. Any help would be appreciated.