Today's prompt was 'sickle'. I found a stone age one, flint glued into a reindeer antler with tar/pitch.

I should go back to the atan2 business and make something which makes sense, then finding the midpoint between two angles, counterclockwise! I can feed in the angle to produce a point around an initial point (to make a triangle fan or simple radial polygon) and check that I'm getting the correct angle with atan2. Point p0 is some point in my map div and p1 is some other point at some random angle and distance. I want to display the angle I used and the angle I get with atan2 to prove that I know what I'm doing.