Or how a simple constraining grid can become a fertile ground for creativity.
Each artwork unique and colorful. All coded in GLSL (GPU fragment shader language)

Polyform : multiple shapes used at the same time
Opacity: additional transparency layer
Position: position of the shape inside cell
Rotation: rotation of the shape inside cell
Feeling: an added graininess
Coordinates: local or global coordinates of the shape
System: polar or carthesian?
Domain warping: an added distortion to the shapes