Oops. I thought I posted this in a general-purpose thread titled “Is there a module that…”, and was going to ask to have these posts moved. I cannot find that one now, if it ever existed. 
At any rate (so to speak), thanks @stoermelder for pointing out the Fives. I think I found the smaller one before but thought that it wasn’t quite what I needed, for some reason. The other one (which I did not see before) should do it.
Ah well, it was still somewhat educational to do it the way I showed in the screenshot. A Grand Journey of Exploration.
@ingo - I shall have to check those out too. Comparators should be simple to figure out, and the MinumusMaximus looks … interesting. 