Click-to-Move a block! Roblox

player=game.Players.LocalPlayer
mouse=player:GetMouse()
mtarget
down

function clickObj()
    if mouse.Target == nil and mouse.Target.Name == {"WallX1","WallX2","WallZ1","WallZ2","Roof","Floor","Baseplate"} then
        mtarget = mouse.Target
        print(mtarget)
        mouse.TargetFilter = mtarget
        print(mouse.TargetFiletr)
        down = true
    end
end
mouse.MouseButton1Down:Connect(clickObj)

function mouseMove()
    if down and mtarget then
        local posX,posY,posZ = mouse.Hit.X,mouse.Hit.Y,mouse.Hit.Z
        mtarget.Position = Vector3.new(posX,posY,posZ)
    end
end
mouse.MouseMove:Connect(mouseMove)

function mouseDown()
    down = false
    mtarget = nil
    mouse.TargetFilter = nil
end