Animating Scenes into Quicktime (fades and hold)

[TGNYC]

I'm trying to generate a 2 or 3 scene quicktime movie that shows a color change in line lights-i did it successfully on a small scale and it was a nice smooth shift over 5 second from blue to magenta...now i have a rendering with several lights that for the life of me i can't figure out the up/down/hold time sequencing. Generally I assign my three scenes(blue/magenta/teal) and then animate the first scene with a 5/5/5 count and the last scene as a 5/5/5 assuming that the 5 sec. hold is between scenes-but nothing happens...the blue is continous thru 15 secs. The closest i've gotten is a race thru colors in one second and holding in the last scene for 4...Can anyone clarify the timing definitions!!!?