- set numrows = 7
- set rowindex = numrows - 1
- Create an empty 2D list with numrows sublists
- within a loop with range of 1 - 378:
- append loop index to sublist [rowindex]
- subtract 1 from rowindex - set to 0 if -1
- append loop index to sublist [rowindex]
Hint: you can create empty 2D list with:
mylist = [[] for _ in range(numrows)]