I cant figure out the error in this script?

bin=script.Parent
local mouse = game.Players.LocalPlayer:GetMouse()
function findPlane(player)
	local list = player.Character:GetChildren()
	for x = 1, #list do
		if (list[x].Name == "Cat") then --Put model name here--
			local weld = list[x]:FindFirstChild("Parts"):FindFirstChild("Seat"):FindFirstChild("SeatWeld")
			if (weld ~= nil) and (weld.Part1 == player.Character:FindFirstChild("Torso")) then
				return list[x]
			end
		end
	end
	return nil
end

function onSelected(mouse)
	mouse.KeyDown:connect(onKeyDown)
end

function onKeyDown(key)
	if (key~=nil) then
		key = key:lower()
		local Test = game.Workspace.Cat  -- LINE 23 -- Replace X with Main Vehicle Model Name
			if (Key:byte() == 56) then  -- Reverse
				script.Value.Value = -1
			end
			if (Key:byte() == 50) then --Move
				script.Value.Value = 1
			end
			if (Key:byte() == 54) then --Stop
				script.Value.Value = -1
			end
				if (Key:byte() == 52) then --Return
				script.Value.Value = 1
				end
			if (script.Value.Value == 3) then  --stop--
				Test.Part0.Motor.DesiredAngle = 0
			end
			if (script.Value.Value == 0) then   --Door closed--
				Test.Part0.Motor.DesiredAngle =math.rad(-135)
				wait(0.01)	
			end
			if (script.Value.Value == 2) then  --stop--
				Test.Part0.Motor.DesiredAngle =Test.Part0.Motor.CurrentAngle + math.rad(0)
			end
			if (script.Value.Value == 1) then  --Door open--
				Test.Part0.Motor.DesiredAngle =math.rad(135)
				wait(0.01)
			end
			bin.Selected:connect(onSelected)

function onSelected(mouse)
	mouse.KeyDown:connect(onKeyDown)
end	


function onKeyUp(key)
	if (key~=nil) then
		key = key:lower()
		local Test = game.Workspace.Cat  -- LINE 23 -- Replace X with Main Vehicle Model Name
			if (Key:byte() == 56) then  -- Reverse
				script.Value.Value = -1
			end
			if (Key:byte() == 50) then --Move
				script.Value.Value = 1
			end
			if (Key:byte() == 54) then --Stop
				script.Value.Value = -1
			end
				if (Key:byte() == 52) then --Return
				script.Value.Value = 1
				end
			if (script.Value.Value == -1) then  --stop--
				Test.Part0.Motor.DesiredAngle = 0
			end
			if (script.Value.Value == 1) then   --Door closed--
				Test.Part0.Motor.DesiredAngle =math.rad(-135)
				wait(0.01)	
			end
			if (script.Value.Value == -1) then  --stop--
				Test.Part0.Motor.DesiredAngle =Test.Part0.Motor.CurrentAngle + math.rad(0)
			end
			if (script.Value.Value == 1) then  --Door open--
				Test.Part0.Motor.DesiredAngle = Test.Part0.Motor.CurrentAngle + math.rad(10)
				wait(0.05)
			end
			bin.Selected:connect(onSelected)

			
function onSelected(mouse)
	mouse.KeyUp:connect(onKeyUp)
end 
end