How to detect if there is a dropped item of a specific type and what type of block is it dropped on.

Hello, I'm trying to make if a specific item is dropped on a specific block it triggers the code.

I'm quite inexperienced with mcreator, but what i managed to get is when that item is dropped, it checks what kind of block the player is standing on,
not the dropped item. I'm sure it has something to do with item entities but I'm not familiar working with that,

Any help would be appreciated, thanks!