Particle effects, usually made by code.
A nice colorful effect called Plasma Particles (by Marko Å valjek).
Make sure you change the settings a bit in top right co ...
Html Canvas Particle Collision
HTML Canvas particles with collision, Sattelite particle effects, created by Marko Å valjek
Hyperstellar Star Particles
Hyperstellar particles animation created by Tiffany Rayside
Eye Laser Experiment
Eye laser experiment by Lukas Haring