Let me tell you something. To do this kind of problem, we must first understand the degree. 90 is the position from 3 o'clock to 6 o'clock on the dial, and it is also the position from 12 to 3 o'clock. When you are still, look at the dial.

As for how to draw it like that, first find the points that are consistent with the surrounding points, then rotate and side by side.

Take it. It's not easy to fight unarmed.