Hierarchical State Machine

A Hierarchical State Machine is a way to organize complex systems that can be in different states, like a machine or software. Instead of listing every possible situation separately, states are grouped into categories or "parent" states, with more specific "child" states inside them. This structure makes managing and understanding the system easier, as changes in a parent state can affect all its children, and specific behaviors are defined for each level. It helps organize complex behaviors efficiently, making the system more flexible, easier to maintain, and better at handling intricate scenarios.