说明：  程序运行首先生成传统的Logistic映射Feigenbaum分岔图。水平方向是参数u，取值范围是0—4；竖直方向是变量x，取值范围是0—1。
(running first generation traditional Logistic Map Feigenbaum bifurcation diagram. The direction is the level parameters u, value in the range of 0-4; Vertical direction is variable x, the value range is 0-1.)