How do you make a power system like FNaF?

I am trying to make a power system like Five Nights At Freddy's and I can't figure out how to make the number of doors closed take away power faster. The Int value NumClosed is added to when a door is closed it adds one to the Number of doors closed. The power Int value starts at 100 and I want it to decrease, however, when I put it into this script:

local power = game.Workspace["Office Stuff"].Power
local doorsclosed = game.Workspace["Office Stuff"].NumClosed
local powerdrainC = game.Workspace["Office Stuff"].ContinousPowerDrainTime

while true do
    wait(powerdrainC.Value - doorsclosed.Value)
    power.Value = power.Value - 1
end

this script is in serverscriptservice BTW It doesn't work and It doesn't subtract from the power value. Can someone help me figure out what to do?