Johan Beeftink (born 1941) is a Dutch organist and composer. On the Groningen conservatory he took classes with Wim van Beek. He studied improvisation with father (Cor) and son (Piet) Kee. He was a teacher until 2004 at the Groningen conservatory, organ and music theory. One of his students was Sietze de Vries.
A very short piece, but ingenious!
Registration:
HW: Praestant 8', Rohrgedeckt 8', Oktave 4'
Pedal: Trompete 8', Oktavbass 8'
Sheet music:
https://www.boeijengamusic.com/nl/koraalbewerkingen-deel-1-psalmen-beeftink-johan.html