statemachine MrsGrantsSecretCompartment

event doorClosed
event drawOpened
event lightOn
event panelClosed

state active
    lightOn	=> waitingForDraw
    drawOpened => waitingForLight

state idle
    doorClosed => active

state waitingForLight
    lightOn => idle

state waitingForDraw
    drawOpened => unlockedPanel

state unlockedPanel
    panelClosed => idle