can someone help explain why this wont constantly rotate with CFrame.fromEulerAnglesXYZ?

I want this part to follow the character and constantly spin, I thought this would make the brick always spin but it only rotates once leaving the brick on an angle still following the player.

function OnPlayerEntered(player)

    local a = Instance.new("Part", workspace)
    a.Anchored = true


    player.CharacterAdded:Connect(function(char)
        while wait() do

            a.CFrame = CFrame.new(char.UpperTorso.Position + Vector3.new(0,0,5)) * CFrame.fromEulerAnglesXYZ(0.1,0.1,0.1)

        end
    end)
end


game.Players.PlayerAdded:Connect(OnPlayerEntered)