01 Standalone

# Import the base Verse framework
using /Fortnite.com/Verse

# Import Fortnite-specific devices and events
using /Fortnite.com/Devices

# This is our main "Brain" device. 
# Think of it as the game mode controller.
TriKeyDoorSystem := class(VerseSystem):
    # These are our VARIABLES. 
    # They start as 'False' (OFF) by default.
    # Think of them as flags on a scoreboard.
    RedKeyFound: bool = false
    BlueKeyFound: bool = false
    GreenKeyFound: bool = false

    # This is the DOOR. 
    # We will connect this in UEFN later.
    # It's a Prop Mover that slides open.
    Door: PropMoverDevice = uninitialized

    # This is the CONSTRUCTOR. 
    # It runs once when the island loads.
    # It's like the "Pre-Roll" ad before the match starts.
    OnBegin<override>()<suspends>:void=
        # Subscribe to the Trigger Events.
        # This means: "When Trigger1 fires, run HandleRedKey"
        # We use the 'Event' property of the device.
        # Note: In real UEFN, you'd wire these up or reference them 
        # via the Scene Graph. For this example, we assume