auto save

my_tree.py

 import turtle
 import turtle
+import random
+
+def tree(n):
+    if n >=0:
+       if n< =12：
+           color_list =['snow','lightcoral']
+           color =random.choice(color_list)
+           pen.color(color)
+           pen.pensize(n / 3)
+        else:
+            pen.color('sienna')
+            pen.pensize(n / 10)
+        pen.forward(n)
+        angle =random.random()
+        pen.right(30*angle)
+        lenth =1.5*random.random()
+        tree(n-10*length)
+        pen.left(60*angle)
+        tree(n-50)
+        pen.right(30*angle)
+        pen.up()
+        pen.backward(n)
+        pen.down
 
 
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
@@ -12,16 +35,6 @@ pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
 
 
-def tree(n):
-    if n >=50:
-        pen.forward(n)
-        pen.right(30)
-        tree(n-50)
-        pen.left(60)
-        tree(n-50)
-        pen.right(30)
-        pen.up()
-        pen.backward(n)
-        pen.down
-tree(100)
+
+tree(60)
 turtle.done()
 turtle.done()