I want my pumps to oscillate, but only during the day.

The program below uses a "dummy" timer.  A dummy timer is one which is configured in the AC but is not associated with a real address (e.g., don't assign it to a DC8 or other 'real' device); I traditionally use addresses out of range for the direct connect and other Neptune accessories (e.g., N01-N16, P01-P16)

DAY&-N01

If Time > 08:00 Then DAY ON
If Time > 20:00 Then DAY OFF

// PMP switched ON 15 minutes, then OFF for 15 minutes but at night they are OFF
OSC 015/015 ON/OFF Then PMP ON
If Timer DAY = OFF Then PMP OFF