I’m currently trying to make amethyst… infectious. What happens is that a budding block of amethyst grows a crystal, that then is replaced with another block of amethyst, like this:
This creates an endless cycle where amethyst gradually spreads all over the world.
Note: because amethyst buds cannot grow into blocks, the infection would only infect open spaces. This is why I would want amethyst, in order to avoid extra work.
How would I do this with commands?