save project

my_tree.py

@@ -6,10 +6,40 @@ pen.color('sienna')
 w = turtle.Screen()
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
 
 
-# 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()
 
 
-turtle.done()
+# 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.down()
+
+# pen.right(30)
+
+# turtle.done()
+
+def tree(n):
+    if n>=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()
+
+tree(333)
+turtle.done()
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