diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..4b0d88b
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,24 @@
+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 = "感谢老铁刷的大火箭！"
+a = ""
+
+
+sd=random.randint(0,len(message))
+for i in message :
+    fgg=i
+    fgg1=random.choice(key)
+    fgg2=random.choice(key)
+    text=fgg+fgg1+fgg2
+    a = text +a
+h=list(a)
+h.insert(sd,"ngjhghg和法国哈哈tjkgjgjfhjkjdhdfk分发给nthjtkjghnghmktiuiiu贵阳人感染jg")
+print("".join(h))
+
+
+# 请使用私钥key，对message进行加密
+
+