This is a atom simulator. Each energy level has its own color. Rotate with arrow keys, z/x for z rot and a/s for Zoom. Space to toggle settings visibility. It is preset at Ytterbium-173 because of my science project. Set electrons per energy level energy level spacing, first level distance, # of protons, neutrons, proton and neutron depth and color, particles speed and size. Some settings will only take effect after a restart of the program.
I borrowed the 3D rendering engine from @r2dav2 Its not perfect