save project

my_tree.py

 import turtle
-import random
-from random import randint
+
 pen = turtle.Turtle()
 pen.color('teal')
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('lightcyan')      # wheat小麦
-index=['ivory','pink']
+
 # 移动到起点
-pen.speed(100)
+pen.speed(10)
 pen.left(90)
 pen.up()
 pen.backward(150)  
  # 后退
 def tree(n): 
-    if n>=5:
-        if n<=7:
-            pen.down()
-            pen.pencolor(random.choice(index))
-            pen.pensize(n//3)
-            pen.forward(n)
-            angle=randint(0,30)
-            length=randint(1,12)
-            pen.right(angle)  
-            tree(n-length)
-            pen.left(angle*2)
-            tree(n-length)
-            pen.right(angle)
-            pen.up()
-            pen.backward(n)
-            pen.down()
-        else:
-            pen.down()
-            pen.color('teal')
-            pen.pensize(n//10)
-            pen.forward(n)
-            angle=randint(0,30)
-            length=randint(1,12)
-            pen.right(angle)  
-            
-
-            tree(n-length)
-            pen.left(angle*2)
-            tree(n-length)
-            pen.right(angle)
-            pen.up()
-            pen.backward(n)
-            pen.down()
+    if n>=50:
+        pen.down()
+        pen.forward(n)
+        pen.right(30)        
+        pen.forward(n-10)
+        pen.up()
+        pen.backward(n-10)
+        tree(n-10)
+        # pen.up()
+        # pen.backward(n-10)
+        #tree(n-10)
+        pen.down()
+        # pen.backward(n-10)
+        pen.left(60)
+        pen.forward(n-10)
+        pen.up()
+        pen.backward(n-10)
+        tree(n-10)
+        # pen.up()
+        # pen.backward(n-10)
+        pen.right(30)
+        pen.backward(n)
+        #tree(n-10)
+        
+        # pen.down()
+        # pen.left(60)
+        # pen.forward(n-10)
+        # pen.left(30)
+        
         
-tree(60)
+        # pen.backward(n-10)
+        # # pen.right(30)
+        # pen.backward(100)
+tree(100)
 turtle.done()