How would I make it so pressing the button turns this script off?

I have a script that, when a button is pressed, turns off all parts named LIGHTS and turns on a rotating emergency light. It also makes a rotating engine part stop, but I do not need that function anymore. The issue is, pressing the button does not turn it off. How would I go about making it that way?

Here is the full script:

local PowerOn = true
local PowerButton = game:GetService("Workspace").PowerButton.PowerShutoff.Detect
local PowerValue = game:GetService("Workspace").Power

local Rotation = 0.1

local Debounce = false

PowerButton.MouseClick:connect(function(Player)
    if not Debounce and Player.Team == (game:GetService("Teams"):WaitForChild("Team") or game:GetService("Teams"):WaitForChild("Security [C-Beta]")) or Player.Team == (game:GetService("Teams"):WaitForChild("Team2") or game:GetService("Teams"):WaitForChild("Team3")) then
        if PowerOn then
            Debounce = true
            for Index,Obj in pairs(game:GetService("Workspace"):GetChildren()) do
                if Obj.Name == "LIGHT" then
                    local Light = Obj:WaitForChild("PointLight")
                    Light.Enabled = false
                end
            end
            for Index,Obj in pairs(workspace:GetChildren()) do
                if Obj:IsA("Model") and Obj.Name == "EmergencyLight" then
                    local RotPart = Obj:WaitForChild("Rotate")
                    RotPart.SpotLight.Enabled = true
                elseif Obj:IsA("Model") and Obj.Name == "Alarm" then
                    Obj.music:Stop()
                end
            end
            PowerOn = false
            PowerValue.Value = false
            game:GetService("Workspace"):WaitForChild("Engine"):WaitForChild("EngineMoving"):WaitForChild("TURN").RightParamB = 0
            for Index,Obj in pairs(workspace.SOUNDPIECES:GetChildren()) do
                Obj.Sound:Stop()
            end
            delay(60, function()
                Debounce = false
            end)
        else
            Debounce = true
            for Index,Obj in pairs(game:GetService("Workspace"):GetChildren()) do
                if Obj.Name == "LIGHT" then
                    local Light = Obj:WaitForChild("PointLight")
                    Light.Enabled = true
                end
            end
            for Index,Obj in pairs(workspace:GetChildren()) do
                if Obj:IsA("Model") and Obj.Name == "EmergencyLight" then
                    local RotPart = Obj:WaitForChild("Rotate")
                    RotPart.SpotLight.Enabled = false
                end
            end
            PowerOn = true
            PowerValue.Value = true
            for Index,Obj in pairs(workspace.SOUNDPIECES:GetChildren()) do
                Obj.Sound:Play()
            end
            game:GetService("Workspace"):WaitForChild("Engine"):WaitForChild("EngineMoving"):WaitForChild("TURN").RightParamB = 0.5
            delay(2,function()
                game:GetService("Workspace"):WaitForChild("Engine"):WaitForChild("EngineMoving"):WaitForChild("TURN").RightParamB = 0.25
            end)
            delay(60, function()
                Debounce = false
            end)
        end
    end
end)

game:GetService("RunService").Stepped:connect(function()
    if not PowerOn then
        for Index,Obj in pairs(workspace:GetChildren()) do
            if Obj:IsA("Model") and Obj.Name == "EmergencyLight" then
                local RotPart = Obj:WaitForChild("Rotate")
                RotPart.CFrame = RotPart.CFrame * CFrame.Angles(Rotation,0,0)
            end
        end
    end
end)