save project

my_tree.py

@@ -5,13 +5,27 @@ pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
+def tree(n):
+    if n>50:
+        pen.speed(100)
+        pen.fd(n)
 
+        pen.rt(30)
+        tree(n-10)
+        pen.left(60)
+        tree(n-10)
+        pen.rt(30)
+        pen.up()
+        pen.backward(n) 
+        pen.down()
+        
 # 移动到起点
 pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-pen.fd(100)
+
+'''
 pen.rt(30)
 pen.fd(50)
 pen.backward(50)
@@ -19,5 +33,7 @@ pen.left(60)
 pen.fd(50)
 pen.backward(50)
 pen.rt(30)
-pen.hideturtle()
+'''
+s=tree(100)
+#pen.hideturtle()
 turtle.done()