save project

my_tree.py

@@ -6,21 +6,26 @@ pen.color('sienna')
 w = turtle.Screen()
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
 
 
+def thee(n):
+    if n>=50:
+        pen.forward(n)
+        pen.right(30)
+        thee(n-10)
+        pen.left(60)
+        thee(n-10)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)    # 后退
+        pen.down()
+
+    
+
 # 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.up()
-pen.backward(50)
-pen.down()
-pen.left(60)
-pen.forward(50)
-pen.up()
-pen.backward(50)
-pen.right(30)
-pen.backward(100)
+
+thee(100)
+
 turtle.done()
 turtle.done()