Introduction guide to overflows for OpenTTD
V453000's Advanced Building Revue:
Overflows I: http://blog.openttdcoop.org/2010/04/26/advanced-building-revue-04-overflows/
Overflows II: http://blog.openttdcoop.org/2010/11/07/advanced-building-revue-08-overflows-ii/
Overflows III: http://blog.openttdcoop.org/2012/06/28/advanced-building-revue-12-overflows-iii/
Music by boxboys:
https://boxboys.bandcamp.com/album/together
https://boxboys.bandcamp.com/track/p-i-x-e-l-2