Pointer-interactive gradients in pure WebGL, about a kilobyte. 80 layers.
amber
blackbody
chrome reflection
lava lamp
lenticular
nebula
turing pattern
static
candlelight
chalk
chromatic aberration
underwater
embers
fibre optics
kaleidoscope
lava
lens flare
lightning
peacock
rain
rust
stained glass
grid
x-ray