用于分形图象，此原程序是将四边形分形，最后变成三角形-for fractal image, the original procedure was Quadrilateral fractal, into triangular final

使用Python绘制的树木源码，主要原理为使用分形画树干、树枝，最终叶节点上画上绿色圆圈代表树叶。 -Drawn using the Python source tree, the main principles for the use of fractal art stem, branch, leaf nodes and draw the final green circles represent leaves.