I need a simple script, that makes me able to change the drop of any block

[FelixALJ]

I need a simple script, that makes me able to change the drop of any block, when said block is broken.

example, player breaks dirt, instead of dirt dropping a dirt block, then dirt drops a different item that is configurable in a GUI. As in the GUI I am hoping that it’s able to: example change what block gets a new loot table, and what drop said block drops. 
 

if anyone is able to make this, that would be appreciated, and it would really help!