3 hints...
1. Shoot the scene on a plain background. GIF compression for images uses the same colour palette for each frame... the MORE complexity, the more bytes needed. The background is adding complexity, ergo, more bytes.
2. Write 'Delude' in a colour which falls in the same pallete, but contrasting it's background, as the image. i.e. adding red adds bytes... so it white, because this colour is common across all frames.
3. Add a black border of 5 pixels around all the frames. This will reduce the amount of bytes needed per-image, as solid colours compress better.
I could do it for you, but being honest, I have much better things to do
