The block is similar to a boiler that emits a redstone signal under certain conditions with text output.

How to make a block that can store water as a Cauldron, 

but instead of 3 bottles of water, it should hold 4, 

And it is necessary that when you click on it, RBM, when it is filled with 0 bottles of water, it is written - "Fuel volume 0/5 l", 

when you add 1 bottle of water, it is already written - "Fuel volume 1.25 l /5l", 

when you add a second bottle of water - "Fuel volume 2.5 l /5l", 

when adding the third bottle of water - "Fuel volume 3.75 l / 5 l" 

and when 4 bottles of water are added, it is written - "Full refueling" and a redstone signal is issued from this block.

Could you help me set it up and create the necessary procedure? 

I would be very grateful for your help!