How do I: 16 color effect for .gif that turns in to 256 color

[Awesome Metal Bands]

How do I create an 16 color effect, when saving my gif animation (save for web and devices) it has an option to lower the number of colors from 256. I normally use the 8 or 16 colors as it gives a great effect to .gif images.

what you get is a Gothic type washed out effect, when you lower the number of colors, when saving a .gif

The overall aim is to have a .gif that starts at 16 colors and at the end turns into 256 colors.

How can I achieve this effect,

thank you

[TiMmY]

Hi,
You could try making the desired image in 256 colour, then save it several times using less colours each time until you reach 16.
Then reverse the order of the save image and compile them into a .gif.
Apart from that I'm not really short what you could do. I've never really tried to do something like this.

Tim