Let me start off by saying thank your to Jotne and RudiC for your quick and helpful answers, I greatly appreciate it

To RudiC's question:
Correct the first 0000 should count up to 2345 in increments of 15 minutes for example: 0000 , 0015, 0030, 0045, 0100, 0115

so the time lines will look like this:

Code:

0000-0600-0015-0600
0015-0600-0030-0600
0030-0600-0045-0600
0045-0600-0100-0600
0100-0600-0115-0600
0115-0600-0130-0600
0130-0600-0145-0600
0145-0600-0200-0600

and so on up to the final report of the day being

Code:

2345-0600-0000-0600