点线不交叉

Pull the line segment to another point, and can not cross the line segment, making a line segment into two new line segments, thus drawing a wonderful graph.

Pull any line segment and fix it to a certain point, and there can be no intersection between the line segments, thus dividing it into two new line segments; and the new line segment can continue to be divided. Repeat so many times, weave a wonderful figure consistent with the goal of customs clearance. You need to observe and try, and give some thought, you can draw one after another beautiful graphics.