How to have lights switch off at different times

[brain shocker]

Hello (newbie) I have set up a simple program to switch "on" my outside lights at sunset and "off" at 11:30PM, is there away to have the lights switch "off" at different times to create the illusion of some one being home? I would also like to switch the bedroom light "on" at a random time after sunset for 30minutes then "off"? Any help would be greatly appreciated, thanks

[apostolakisl]

IF

from time a to time b

Then

set light on

Else

wait 30 minutes random

set light off

 

The above turns lights on at time a and off at time b plus 0 to 30 minutes at random.