diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..0f456e8
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,22 @@
+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 = "诺依,周末一起去看动漫展吧!"
+son="11j1khjh1kghw21gg3h2ashdgcawy98e26edzspuidgui"
+e=""
+# 请使用私钥key,对message进行加密
+for i in message:
+    c=i
+    a=random.choice(key)
+    b=random.choice(key)
+    d=a+b+c
+    e=d+e
+print(e)
+
+a=list(e)
+a.insert(random.randit(0,len(a)),son)
+a="".join(a)
+print(a)
+