[Good painting] 2021.12.7+8-tree

Preface

This is a series that organizes and publishes the "open the drawing software and draw a little" series, which is called "open the painting" for short.

In order to develop a habit, one needs to lower the threshold of one’s own practice of a certain habit, and then get used to doing it every day. Years, three years, five years, ten years, twenty years... that's pretty incredible.