diff --git a/lesson14-diy1.py b/lesson14-diy1.py
new file mode 100644
index 0000000..4e5b1d9
--- /dev/null
+++ b/lesson14-diy1.py
@@ -0,0 +1,10 @@
+def sum_numbers(num):
+      # 递归的出口
+      if num == 1:
+           return 1
+
+      #  数字的累加
+      temp = sum_numbers(num - 1)
+      return num +temp
+result = sum_numbers(100)
+print(result)
\ No newline at end of file