Basic Minecraft auto-crystaler. Holding right click will place and destroy crystals automatically (you can change the speed in which this happens by changing the delay in the cose) It is Default set to a certain delay to be undetected . I personally found this very useful, hopefully it can help you too. I have another program which can place the obsidian with a click of a button aswell, message me if you would like that.
Download the program (Download) and go to the macro editor
press the button «Open file»
and select the downloaded file
assign a macro to a key and run the program