Falling

Particle systems are fun to tinker with.

This one is reasonably simple:

• Particles within an inner circle have their velocity negated and scaled depending on their circle overlap
• Particles above the circle increase in vertical velocity, and vice verse
• Particles left of the circle increase in horizontal velocity, and vice verse

I tried varying the radius of the circle over time but didn't like the result. I think keeping it fixed nicely emphasised the negative space. Moving the circle doesn't seem as bad, though I'm not sure.