This implement is very complex because of limitation of incompatibilities among browsers.
If you want to display 8 color bars, it needs 255 gifs.
It might be not realistic, isn't it?
???????? 255 ???????
Why not...
I am ready to try... this would be great. I use your piCal and I have a lot of "multiple days" events... and this is very power full.
So ... how can I do ?
I've already write why piCal shows only 4 bars.
If you want to inclease the number of bars,
Do it yourself.
I'm too busy to teach you how to hack.
Sorry.