save project

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
 w = turtle.Screen()
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
-
+pen.speed(100000000000)
 # 移动到起点
 # 移动到起点
 pen.left(90)
 pen.left(90)
 pen.up()
 pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
 
 
-pen.forward(100)
-pen.right(30)
-pen.forward(50)
-pen.penup()
-pen.forward(-50)
-pen.pendown()
-pen.left(60)
-pen.forward(50)
-pen.penup()
-pen.forward(-50)
-pen.right(30)
-pen.forward(-100)
-pen.setheading(90)
+def tree(n):
+    if n>=10:
+        long=random.randint(5,15)
+        jiao=random.randint(5,50)
+        pen.forward(n)
+        pen.right(jiao)
+        tree(n-long)
+        pen.left(jiao*2)
+        tree(n-long)
+        pen.right(jiao)        
+        pen.penup() 
+        pen.forward(-n)
+        pen.pendown()
+        
         
         
+tree(100)
 turtle.done()
 turtle.done()
\ No newline at end of file