diff --git a/my_tree.py b/my_tree.py
new file mode 100644
index 0000000..27bd62d
--- /dev/null
+++ b/my_tree.py
@@ -0,0 +1,25 @@
+import turtle
+
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+
+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.backward(n)
+
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+
+tree(100)
\ No newline at end of file