urinal.statecharts.js

const urinal = Machine({
  id: 'urinal',
  initial: 'inactive',
  states: {
    inactive: {
      on: {
        OBJECT_FOUND: 'rinsing'
      }
    },
    
    // rinse for 2 seconds, then off.
    rinsing: {
      on: {
        RINSE_COMPLETE: 'detecting'
      }
    },

    // When the object is gone, do the cleanup rinsing.
    detecting: {
      on: {
        OBJECT_GONE: 'cleanup_rinsing',
        OBJECT_FOUND: 'rinsing'
      }
    },

    // Rinse for 5 seconds then turn off
    cleanup_rinsing: {
      on: {
        RINSE_COMPLETE: 'inactive'
      }
    }
  }
})