auto save

my_tree.py

+import turtle
+
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+pen.fd(100)
+pen.rt(30)
+pen.fd(115)
+pen.fd(-115)
+pen.rt(-60)
+pen.fd(115)
+turtle.done()