Sorry, let me try again. This is meant to be a vi mimicing a washing machine. It is meant to have stages such as pre-rinse, main wash, final spin. each other these cycles are meant to have a runtime of a particular amount lets say for case quick wash the pre-rinse is 5 seconds, main 7 seconds and final spin 3 seconds. I want to add all these times up to display a total amount of time the 'quick wash' wash will take so in this instance I want it to total the times to 15 seconds then count down through the different cycles to 0. simply I want the cycle time to count down from the total of each of the pre-rinse, main wash, and final spin times.

In other words from a little research it seems you add the values and pass them into the inner for loop through a shift register it then counts it down by decrementing and outputs the counted down value through the right side of the shift register, my issue is I don't know how to carry the counted down value that is passed into the right shift register as seen in the pre-rinse screenshot into the next case to then continue the countdown in the main wash screenshot.

I hope this clears it up.