diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..5c0f78d
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,17 @@
+import random
+key = "abcdefgh使用编程实现位移替换加密，制作密码机关真是太好玩了哈哈！"
+message = input("请输入:")
+key_message=""
+noise="@#$%^&*"
+for i in message:
+   str1=i
+   str2=random.choice(key)
+   str3=random.choice(key)
+   text=str1+str2+str3
+   key_message=key_message+text
+list_message=list(key_message)
+list_message.insert(5,noise)
+result_message="".join(list_message)
+print(result_message)
+
+