diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..f7baa0a
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,22 @@
+import random
+
+# 私钥
+k = "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
+m = "诺依，周末一起去看动漫展吧！"
+k_m=''
+h="jkhj;oejhpphoj"
+for i in m:
+    s=i
+    b=random.choice(k)
+    w=random.choice(k)
+    o=s+b+w
+    k_m=k_m+o
+     
+list_m=list(k_m)
+t=random.randint(0,len(k_m))
+list_m.insert(t,h)
+r_m="".join(list_m)
+print(r_m)
+
+