It will an upcoming song in Tomy Thomas and Friends: Sodor Transformers.
So long old friend,
I wish that I could see you once again.
I never knew, the time would come, when I'd be losing you.
I hope you know I never meant to treat you badly,
and now I know just what a friend like you is for.
I never thought that it would end so sadly,
and you'd be walking through that door.
(repeat first verse)
I always thought our fun and games would just go on and on,
I never knew I'd have to say "So long"...