the grouping has to be done on the shades vendor's side, if the vendor provides such functionality.
For a pause you can define 3 flags: TimerShade1 and TimerShade2, TimerShade3:
THEN SEND Shayla'sSheer OUT SERIAL 3
THEN ShaylasBlind OFF
THEN TimerShade1 ON for 2 seconds
WHEN TimerShade1 OFF
THEN SEND Damen'sSheer OUT SERIAL 3
THEN DamensBlind OFF
THEN TimerShade2 ON for 2 seconds
WHEN TimerShade2 OFF
THEN SEND MstrBedTopDn OUT SERIAL 3
THEN MstrBedBlind OFF
THEN TimerShade3 ON for 2 seconds
etc.