I have 15 minute interval data in column A and through vb code I need to
select the data in column B and have it moved to match the cooresponding row
in column A. In other words, if there isn't an interval of 6:15 in column B
then I want to leave that row blank. In the example below, the interval in
Column B row 2 should be moved to row 3 since it matches what's in column A.

Any help you can provide would be greatly appreciated! Many thanks!

Column A Column B Desired Results for Column B
1) 6:00 6:00 6:00
2) 6:15 6:30
3) 6:30 6:45 6:30
4) 6:45 7:15 6:45
5) 7:00
6) 7:15 7:15
.......
11:30