auto save

my_tree.py

 import turtle
 import turtle
-
+import random
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
 # 画布大小
 # 画布大小
@@ -15,16 +15,23 @@ pen.down()
 def tree(n):
 def tree(n):
     if n>=0:
     if n>=0:
         if n<=12:
         if n<=12:
-           color_list=['snow','lightcoral']
-           color=random.choice(color_list)
-           pen.color(color)
-           pen.pensize(n/3)
+            color_list=['snow','lightcoral']
+            color=random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/3)
         else:
         else:
             pen.color('sienna')
             pen.color('sienna')
             pen.pensize(n/10)
             pen.pensize(n/10)
         pen.forward(n)
         pen.forward(n)
         angle=random.random()
         angle=random.random()
-        pen.righ
-       
-tree(100)
+        pen.right(30*angle)
+        length=1.5*random.random()
+        tree(n-10*length)
+        pen.left(60*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+tree(60)
 turtle.done()
 turtle.done()