save project

my_tree.py

 import turtle
 
 pen = turtle.Turtle()
-pen.color('sienna')
-
+pen.color('red')
+pen.speed(0)
+pen.pensize(30)
+pen.left(90)
 w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
+w.bgcolor('black')
+pen.pu()      
+pen.backward(150)
+pen.pd()# wheat小麦
+def tree(n): 
+    if n>50:
+        pen.fd(n)
+        pen.right(30)
+        tree(n-10)
+        pen.left(60)
+        tree(n-10)
+        pen.right(30)
+        
+        pen.pu()
+        pen.backward(n)
+        pen.pd()
 
-
-# 移动到起点
-pen.left(90)
-pen.fd(100)
-pen.left(30)
-pen.fd(100)
-pen.up()
-pen.backward(100) 
-pen.pd()
-pen.right(60)
-pen.fd(100)
-pen.pu()
-pen.backward(100)   # 后退
-pen.down()
+print(tree(100))
+        
+    # 移动到起点
+    #pen.left(90)
+    #pen.fd(100)
+    #pen.left(30)
+    #pen.fd(100)
+    #pen.up()
+    #pen.backward(100) 
+    #pen.pd()
+    #pen.right(60)
+    #pen.fd(100)
+    #pen.pu()
+    #pen.backward(100)   # 后退
+    #pen.down()
 
 turtle.done()