Code (Text):

1. on block place:
2.     loop all blocks around event-block in radius 3:
3.         if loop-block is chest or trapped chest:
4.             send "chest"

something like this, didnt test

 

it depends on how you place your if statements, send me your code

 

I'm sorry, but we don't give exact answers here because then we wouldn't be doing our job. You know how to check what the loop-block and event-block is, so try to get it working by yourself. We aren't spoon feeders.(not trying to be harsh, just the truth)