Door opening puzzle

[Kxlypso (明 Kxlypso)]

Hello! I´m building my very first project in UE 5 for a university assignment and got stuck. So, i would like to make a puzzle where the player has to light up 4 torches in order to open a door. I managed to build the blueprint for the torches, but i don´t understand how to connect that to the action of opening the door. Any help is much appreciated

(that is for the torches)

[ClockworkOcean]

You need a central BP actor to count the lit torches.

When they light a torch, you tell that BP, the add 1.

When all 4 are lit, the central BP can tell the door to open.