Just something I threw together in a few hours. The first thing that came to my mind was "Clean guitar lullaby." And yes, it was very AcousticBrony inspired. Chorus + Flanger + Phaser + Vibrato = Heavenly sound.
Not really the best I could have done on an instrumental but I think it actually turned out pretty well. I was actually just fiddling around with pedal effects and chords and suddenly got this song. It's a short song, though.