"On the Walls of the Wonderful White Wash - Waltz" is one of six piano solo pieces composed in 2019 for Joanna Ezrin. The title is a paraphrase of "An der Schoenen Blauen Donau" an implied comparison between that famous European river and El Rio de la Nuestra Senora de los Angeles de Porciuncula, the mighty headwaters of which are located at the confluence of streams called Calabasas Arroyo and Bell Canyon Creek under the Owensmouth Bridge behind Canoga Park High School in the west San Fernando Valley region of Los Angeles, California.