Craig Kupka - Electric Piano, Vibraphone, and Percussion 
Why even name songs when you can woo me with the list of instrumentation? The version I downloaded also included "and Rain", which made me say "yes, please" to no one in particular when I saw it.
While Craig Kupka's more new age oriented albums, Clouds and Crystal, are on Spotify, the album this is from, Modern Dance Techinque Environments is, sadly, not. They're all good listens, but this one has the best spiral, so much so that if you told me it was from a hypnosis record, I'd believe you.
Both unrushed and well paced, the track is constantly building variations just when you would want it to. And did I mention that great combination of instruments? Cause it's truly something special.