diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..85656d2
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,21 @@
+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！"
+s=''
+# 请使用私钥key，对message进行加密
+for i in message:
+    str1 = i
+    str2 = random.choice(key)
+    str3 = random.choice(key)
+    text = str1 + str2 + str3
+    s+=text
+print(s)
+p= list(s)
+a='防护等级卡萨伐yuichb飞机gfd和个体uv均免fddsgf费与撒fds气青蛙健康丢'
+p.insert(random(0,len(s),x)
+p.insert(5,a)
+s="".join(p)
+print(s)
\ No newline at end of file