[magick-users] Composing Tif-files

[hiller]

Hi,

I have four Tif-Files in colorspace gray with channel-depth 1-bit.

I want to compose those images over each other like this:

First image colorized black to cyan.
Second image colorized black to magenta and white as transparent
Third image colorized black to yellow and white as transparent
Fourth image with withe as transparent

I got it to work to colorize using for example:

convert example.tif -fill cyan -opaque black cyan.tif

But I do not get it to work together. Is anybody out there who knows how 
this works?

Thanks in advance

Gerhard