police light system

local r = 255
local b = 0
light = false
local ply = LocalPlayer()
hook.Add("Think", "HookKeyManagement", function()
    for i=1, 159 do
        if(!vgui.CursorVisible) then break; end;

        if(input.WasKeyPressed(i)) then
            hook.Call("KeyPressed", nil, i);
        end;

        if(input.WasKeyReleased(i)) then
            hook.Call("KeyReleased", nil, i);
        end;
    end;


    if light == true then

    	LightOn()

    end
end);


hook.Add("KeyReleased", "TestShiftBlablabla", function(Key)
    if(Key == KEY_LSHIFT) then

    	if light == false and ply:InVehicle() == true then

    		LightOn()

    	end

    	if light == true and ply:InVehicle() == true then

    		LightOff()

    	end

    end
end)

function LightOn()

	light = true
    print("light on")
    local dlight = DynamicLight( LocalPlayer():GetVehicle():EntIndex() )
    dlight.pos = LocalPlayer():GetVehicle():GetPos() + Vector(0, 10, 0)
	dlight.r = r
	dlight.g = 0
	dlight.b = b
	dlight.brightness = 2
	dlight.Decay = 1000
	dlight.Size = 200
	dlight.DieTime = CurTime() + 1

end

function LightOff()

	light = false
    print("light off")
    r = 0
    b = 0

end