diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..3f13036
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,18 @@
+import random
+
+# 私钥
+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！"
+# 要加密语句
+message = input("1234566767878:")
+noise = "port:@!@!@#$#@$%$%^%U&^P))(*^$%)"
+# 请使用私钥key，对me
+for i in message:
+    str1 = random.choice(key)
+    str2 = random.choice(key)
+    str3 = i
+    text = str1 + str2 + str3
+    key_message += text
+
+
+list_message = list(key_message)
+index = random
\ No newline at end of file