how about the easiest one out there:

Code:
Start:

High Porta.1

High porta.0
Pause 500
Low Porta.0
Pause 500                       '1 second

High porta.0
Pause 500
Low Porta.0
Pause 500                       '2 seconds

High porta.0
Pause 500
Low Porta.0
Pause 500                        '3 seconds

High porta.0
Pause 500
Low Porta.0
Pause 500                       '4 seconds

High porta.0
Pause 500
Low Porta.0
Pause 500                       '5 seconds

High porta.0
Pause 500
Low Porta.0
Pause 500                       '6 seconds

Low Porta.1
pause 1000

goto start
it might not be the smallest in code size, but it will work and its really easy to understand!!!