It’s simple all the minis need a base layer so do all that at once then you pull out all the minis who need blue to the blue then you pull out all the ones who will have red and you do the red… And now you pull out all the blue ones again because you realize you skipped a step when you did the yellow.
I know soldiers who have had larger shits after field training. Source I worked at a rec center that would be their first stop as they prep to go home. And I would check the bathroom and see that it was left when they could not flush it.