auto save

g.py/gdssfkjdhg.py

+def ikun(n):
+    if n<=2:
+        return 1
+    else:
+        value=ikun(n-2)+ikun(n-1)
+        return value
+print(ikun(20))
\ No newline at end of file

my_tree.py

 import turtle
 import random
 pen = turtle.Turtle()
-pen.color('sienna')
-
+pen.color('yellow')
+pen.speed(10)
 
 def tree(n):
-    if n >= 10:
-        a = random.randint(0,50)
+    if n >= 1:
+        a = random.randint(0,40)
         b = random.randint(4,15)
 
-        if n < 20:
+        if n < 3:
             pen.color(random.choice(['snow','lightcoral']))
             pen.pensize(n/3)
         else:
@@ -17,21 +17,21 @@ def tree(n):
             pen.pensize(n/15)
         pen.forward(a)
         pen.right(b)
-        tree(n-10)
+        tree(n-3)
         pen.left(2*b)
-        tree(n-10)
+        tree(n-3)
         pen.right(b)
         pen.up()
         pen.backward(a)
         pen.down()
 # 画布大小
 w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
+w.bgcolor('whe')      # wheat小麦
 
 # 移动到起点
-pen.left(90)
+pen.left(100)
 pen.up()
 pen.backward(200)    # 后退
 pen.down()
-tree(100)
+tree(60)
 turtle.done()