ihsm

/*             (_) | |__    ___   _ __ ___                    */ 
/*             | | | '_ \  / __| | '_ ` _ \                   */
/*             | | | | | | \__ \ | | | | | |                  */
/*             |_| |_| |_| |___/ |_| |_| |_|                  */

Idiomatic hierarchical state machine