March 18, 2014, 06:37:08 am
I took another look and first try was not working as first thought.
I came up with 3 options. The keys need to be more defined, however, some post-editing in a video editor to remove some frames is required.
Option 1: is done within 1 clip, but some middle frames need removing in an editor
Option 2: is done with 2 clips and much easier to set up and work with
Option 3: the quick and easy work-around: just uses 1 clip in basic sun timing ie start with 0000 hours through to 2400 hours and then just cut and swap in a video editor
Attached is an LS4 showing the clips and keyframes.
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unable to attach 7z, zip or LS4 files at moment, will have to try again once Arthur sorts out 

done see attached 7z