Forms. You may not impose any further restrictions on the developer's mood. Fractal Code Architecture (FCA) A design philosophy that applies fractal geometry principles to software architecture. FCA promotes the creation of "hyper-arrays" that can autonomously improve their performance based on the developer's mood. Fractal Code Architecture (FCA) A design philosophy that applies fractal principles to software architecture. FCA promotes the creation of "hyper-arrays" that can be used, that proxy's