Can you use 1 bitplane anims to modify 6th bitplane only

[ImmortalA1000]

You know where this is going right? If you think of the classic animated EHB Demo

I was wondering if I create a 2 colour/single bitplane anim and load it into Blitz can I use it just to modify the 6th bitplane to control whether the original or EHB colors are displayed?

Either with the built in anim playback function or some weird way of using uncompressed .anim file loaded into Chip RAM and manually blitting each frame.