The download code for this track comes with the book Brian Eno: Visual Music by Christopher Scoates published by Chronicle Books LLC.

Notes taken from the book:

This book is accompanied by an excerpt from CAM (Canada, Amsterdam, Milan), 1983-84, a previously unreleased composition by Brian Eno. The original composition was of indeterminate length and versions of it were included in many of his exhibitions between 1983 and 1995.

This track was later included on the Music for installations box set (2018) asFive Light Paintings (https://www.discogs.com/Brian-Eno-Music-For-Installations/master/1358475)