Iterating over a list in pseudo-random order without storing a shuffled list

Question

In a game, we use a technique called \'colour picking\' to select units.

This means that every visible unit is given a unique colour.

Here is an example of a

Answer 1

Can you simply take step_size to be the total available colors divided by the total units, and then use (unit_index * step_size) as the color for each unit?