Procedur for the Block is not working

hello,

I try to create an analyzer, a block that should analyze specific items, the analyze process should be 40 seconds and once that process is done (the 40 seconds over) it should remove 1 item from the input slot and put either with a chance of 65% a bone or with a chance of 70% bone meal.

The process is shown with a bar that goes from left -> right. 

However it doesn't work as intended. Either it uses rapidly fast all the items from the stack I put into the input slot while it only put 1 bonemeal and 1 bone in the output slot

Or it just does simply nothing | Or it doesn't reset the process bar | takes 1 items and put 1 item in the output while the process bar is still counting -> does not reset the bar back to 0 | or it just happen that i can use the block 1 time and then it doesn't work anymore.

I watched several tutorials but they only was about creating smelters or furnaces and that in older version of MCreator - where I can not take the procedure to 100%.

I hope someone can help me out.

best regards,

DaiEgul