一个小型的画图程序，可以选择颜色，线条类型，形状等功能。可以学习怎么调用画刷，怎么设置颜色，画出彩色矩形、椭圆等-A small drawing program, you can choose the color, line type, shape and other functions. You can learn how to call the brush, how to set the color, draw colored rectangle, ellipse, etc.