Ticks one loaded chunk per player per tick, executing all functions tagged
#wishlist:random_tick.
Any function tagged #wishlist:random_tick is called once per tick with the
position of the north-bottom-west corner of a random chunk. Here's an example
of one such function that targets every entity in that chunk:
execute as @e[dx=16,dy=256,dz=16]
at @s
run <your code here>
Updates every tick