Help adding Stalactites and Stalagmites

Set blocks this block can replace to cave air, set tick randomly to true, and make a procedure for "on block tick update" to do this:

(for stalactite)

• If not block at [x] [y + 1] [z] = stone:
  • Set block at [x] [y] [z] to [cave air]

(for stalagmite)

• If not block at [x] [y - 1] [z] = stone:
  • Set block at [x] [y] [z] to [cave air]

Make sure to set the generation very high, otherwise you will get barely any!

Note: I found this while making crystals.

then set it to replace normal air

I don't quite understand, can you send a screenshot.