Fonts with white colour . No reverse contour

How would I create a font in glyphs lite that will print black and white on a colored background with no reverse contours

Can you show an example what you mean?

A rough sample to show what I mean

You need either a color font or two fonts that are put on top of each other. Color fonts are not supported in Glyphs Mini and layered fonts are possible but a bit cumbersome.

This are the tutorials (for the full Glyphs)