Spirograph: it has a few random parameters and some random colors (it changes the standard excel color palette, which takes a few seconds) and then starts to generate a nice pattern. Press the button ‘maak bitmap’ to save the pattern as a bitmap. the pixels you see are all coloured Excel cells.

Spirograaf

Some math stuff. Just like the previous one the program calculates the color of a cell based on some sort of formula. This one has only one formula. To change the pattern you have to delve into the code. I think this formula uses tan()

Beauty eh?

Morphing letters. Every character has a definition of a few points and Excel draws the character based on that and creates transitions between the different characters.
A nice little effect with some pretty neat and well documented code.

morphing letters

Particles. A not very good particle simulator. They all have mass and can merge, thereby gaining mass.

Particles

Ant simulator: two competing ant colonies build a nest, foraging, defending and attacking. No user input whatsoever. Except to start the thing.

Ants

Sinusidal: just some random standard Excel shapes moving and rotating according to some sinus patterns. Looks nice though. Use Escape to leave full screen mode. Start the first macro.

Sinus2

Random midi’s:
This program creates random songs based on a few parameters and some in-programmed music logic.

Getting the parameters right is not very easy and I saved the file for new nice parameters AND new code. So you could have a new version, where you would have more freedom and possibilities, but you would have  rubbish parameters.

This version is just the latest in all its ugliness.

I used to be very paranoid, people would steal this brilliant (ahem) idea. But there have been quite a few better programs available now. And who wants to trudge through ugly badly documented VBA code?

Random midi music