This is a few step guide.



Step1:Dig 4 blocks wide.

Step2:The 2 middle spaces dig 1 more block deep.

Step3:Put a ice block at the end

Step4:Pur a bucket of lava at other end.

Step5:Hurry up and break the ice block

Step6:Get a pic and dig and it will keep respawning.

Well thats how you make a cobble stone genarator.

ps.Also if obsideon comes up dig it out and put new bucket of lava same with ice but just break it again.