save project

my_tree.py

@@ -7,47 +7,38 @@ 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(80)
-# pen.up()
-# pen.backward(80)
-# pen.down()
-# pen.left(60)
-# pen.forward(80)
-# pen.backward(80)
-# pen.right(30)
-# pen.backward(150)
 pen.left(90)
-pen.speed(0)
-def tree(a):
-    if a>=5:
-        pen.forward(a)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+def tree(n):
+    if n>=10:
+        pen.forward(n)
         pen.right(30)
-        tree(a-3)
-        
+        tree(n-10)
         pen.left(60)
-        tree(a-3)
+        tree(n-10)
         pen.right(30)
         pen.up()
-        pen.backward(a)
+        pen.backward(n)
         pen.down()
-
-    
-
-tree(100)
-
-
-
-
-
-
-
-
-
-
+tree(50)
+turtle.done()
+'''
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+pen.forward(150)
+pen.right(30)
+pen.forward(80)
+pen.up()
+pen.backward(80)
+pen.down()
+pen.left(60)
+pen.forward(80)
+pen.backward(80)
+pen.right(30)
+pen.backward(150)
 turtle.done()
+'''