Vehicle keyboard input script does not work. How do I fix it?

Alright, so I made a LocalScript where if someone's in a VehicleSeat and the key "P" is pressed, a brick in the Workspace will turn Blue. My script won't work though, nothing shows up in the Output or Script Analysis. Can someone please fix it? Thank you in advance.

-NightlyBasis

local uis = game:GetService("UserInputService")

script.Parent:WaitForChild("Humanoid").Changed:connect(function()
    if script.Parent.Humanoid.SeatPart ~= nil then
       uis.InputChanged:connect(function(input)
            if input.KeyCode == Enum.KeyCode.P then
                game.Workspace.BlueEvent:FireServer()
            end
        end)
    end
end)