auto save

my_tree.py

 import turtle
 import random
+import time
+start = time.time()
+print(start)
+color = ['snow','lightcoral']
 def tree(n):
     if n >= 0:
+        if n <= 2:
+            pen.color(random.choice(color))
+            pen.pensize(3*n)
+        else:
+            pen.color("sienna")
+            pen.pensize(n/10)
         pen.fd(n)
         angle = random.randint(0,30)
         length = random.randint(1,15)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
+        pen.right(angle)
+        tree(n-length)
+        pen.left(2*angle)
+        tree(n-length)
+        pen.right(angle)
         pen.up()
         pen.backward(n)
         pen.down()
 pen = turtle.Turtle()
+pen.hideturtle()
+pen.pensize()
 pen.color('sienna')
 pen.speed(0)
 # 画布大小
@@ -25,5 +37,8 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-tree(100)
+tree(80)
+end = time.time()
+print(end - start)
 turtle.done()
+                                                                    
\ No newline at end of file