save project

my_tree.py

@@ -6,20 +6,22 @@ pen.color('sienna')
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 
-# 移动到起点
 pen.left(90)
-pen.up()
-pen.backward(150)    # 后退
-pen.down()
-pen.forward(150)
-pen.right(30)
-pen.forward(150)
 pen.penup()
 pen.backward(150)
-pen.pendown()
-pen.left(60)
-pen.forward(150)
-pen.backward(150)
-pen.right(30)
-pen.backward(150)
+pen.down()
+def tree(n):
+    if n>=50:
+        pen.forward(n)
+        pen.right(30)
+        tree(n-10)
+        pen.left(60)
+        tree(n-10)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+tree(100)
+# 移动到起点
+
 turtle.done()
\ No newline at end of file