help on procedure

I need to make functional structure and i need procedure for this.
I want it to be something like- block 1 checks if there is block 2 above him and if block 2 has water and lava bucket inside
if all right, water and lava removes from block 2 and item spawns next to block 1
(block 2 has own GUI)
idk how to make it, can someone please make this? (better send as screenshot)