save project

my_tree.py

 import turtle
+import random
+
 
 pen = turtle.Turtle()
 pen.color('sienna')
@@ -6,11 +8,25 @@ 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()
 
+def tree(n):
+    if n>=0:
+        pen.speed(0)
+        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()
+# 移动到起点
+
+
+tree(60)
 turtle.done()
-,
\ No newline at end of file