All sounds from Minetest Game:

AGFX (CC BY 3.0):
https://www.freesound.org/people/AGFX/packs/1253/
  water_footstep.1.ogg
  water_footstep.2.ogg
  water_footstep.3.ogg
  (water_footstep.4.ogg is silent)
