Choan Gálvez 
A longing melody, with some dramatical rubato. "Three", from _For Four Fingers_: https://www.youtube.com/watch?v=izaGwtCZ0L4
YouTube
Or not so longing. And on a #banjolele: https://www.youtube.com/watch?v=wefkDHmy0HA (performance by Mustafa Kamaliddin).
Three - Choan Galvez | Banjolele | Custom Beansprout Instrument | High-G
_For Four Fingers_ includes ten brief original pieces by Choan Gálvez for #ukulele in high G tuning. Each one uses a range of just four frets (plus open strings), so there's no need to displace the fretting hand along the fretboard. The campanella technique is then used for fun and profit.
The digital sheet music book is available from The Ukulele Bookshop at https://www.theukulelebookshop.com/p/for-four-fingers/
For Four Fingers - New campanella pieces for re-entrant ukulele (PDF)
For Four Fingers is a collection of ten one-minute pieces for re-entrant ukulele. They are, mostly, simple melodies where the movement of the fretting hand has been intentionally restricted to the four frets at reach in a single position.Each score fits in one page, and the fingering starts one posi