5 diffrent trees, 1 spawn.

Hihi,

im having trouble with a random spawn chance for models.

My mod idea is to have a custom sapling, that when applied bonemeal it grows and spawns in a custom tree model.

I have made 6 tree models, but i always want to make atleast 1 spawn out of the 6 with all having the same chance.

having a 50/50 on all tree models, if that makes sense.

Right now my procedure looks like this

This is for 5 trees [structures]

But somehow it keeps only spawning the first or last.

Can someone help me out here?

Much appreciated