Create a list of differences from another list

[eps_prof]

Hello, I take the liberty of asking the community for a problem when calculating the differences between each number in a list:

Take for example times that are stored in a list:

List 1 with only single digits:
List1 = (76,78,79,80,82).

The output in label1 is (2,1,1,2) which corresponds well to the difference between (item2 78-item 1 76), (item3 79-78 item2), (item4 80-item 3 79), ( item5 82-item 4 80).

I added a condition to say not to do the calculation if the analysis is done on item 1 and to prevent AI2 from going looking for item 0 which does not exist! It seems to work ... but ...

When I change the list with identical values, it doesn't work.

For example, List 2: (76,79,79,80,82)
Output in label1: (3,3,1,2) which is wrong , I should have (79-76 = 3, 79-79 = 0.80-79 = 1.82-80 = 2) >>> (3,0,1,2)

If I make a new list (76,79,79,79,82) I have (3,3,3,3) instead of (3,0,0,3)

Thanks for reading this post and thanks in advance if you have a solution to this issue ...
Good day
Cedric

[TIMAI2]

Use the for each number block and work through both lists using indexes. This helps to overcome duplicate entries.

[eps_prof]

Thanks Tim for this tip! I'm posting the code if that helps ...