Green flag. Then tweak the sliders to move the light source around and change its intensity.
Slight tweak to Time_tripper's fast Voronoi generator. I'm toying with an idea for displaying molecules in 3D... (Idea for a program: one of these floating balls with a piece of string hanging off it - a floating balloon! - and 10 minutes later... done :-) https://scratch.mit.edu/projects/114519977/ )
