Detect player breaking block

[ChedRed / CardRed]

How do I detect if a player is breaking a block? I'm trying to make the player produce a block breaking effect while having 256 mining fatigue

 

[JustImagineIt]

That would be the player left/right click events, which happen beforeish the achtual block changes.

 

[ChedRed / CardRed]

how do I detect when the player stops breaking a block