Chemistry
Le Chatelier's Principle
A + B ⇌ C + D (stress → shift toward products)

Applying stress to the equilibrium consumes reactants A and B while products C and D rise, restoring the reaction quotient toward K.
Computed & rendered in pure C# on the frozen OnlyCSharp 1.8 library — animation baked to GIF with the library's own
Gif encoder (no GPU, no ffmpeg, no external packages).