save project

my_tree.py

 import turtle
-
+import random
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
@@ -11,7 +11,18 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
+#
 pen.forward(100)
 pen.right(30)
 pen.forward(50)
+pen.up()
+pen.backward(50)
+pen.left(60)
+pen.down()
+pen.forward(50)
+pen.up()
+pen.backward(50)
+pen.right(30)
+pen.backward(100)
+pen.down()
 turtle.done()