Thanks prkos ! That's exactly what I needed (the Tiled clones solution). Good stuff.
I am very impressed with Inkscape. I've been using it for 3 days and already managed to achieve quite a lot.
Jakub

How can I create up to 80 (but in principle an N number of) short vertical lines in a such way that their color would represent a light spectrum ? I am sure this can be done in a simple straightforward way. I tried to experiment with setting a rectangle filled with a grid of colors as a background a...