auto save

my_tree.py

 import turtle
 import turtle
+import random
+
+def tree(n):
+    if n>=50
+        pen.forward(n)
+        angle = random.randint(0,30)
+        angle = random.randint(1,15)
+        pen.right(30)
+        tree(n-10)
+        pen.left(2*angle)
+        pen.left(30)
+        tree(n-50)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
 
 
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
@@ -11,5 +27,11 @@ pen.left(90)
 pen.up()
 pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
-
+pen.pensize(10)
+pen.forward(200)
+pen.right(30)
+pen.forward(100)
+pen.forward(-100)
+pen.left(60)
+pen.forward(100)
 turtle.done()
 turtle.done()
\ No newline at end of file