diff --git a/cipher.py b/cipher.py
index 0e772db..b71f61a 100644
--- a/cipher.py
+++ b/cipher.py
@@ -1 +1,14 @@
-# add your code here
+def caesar_cipher(text, shift):
+    result = ""
+    for char in text:
+        if char.isalpha():
+            shift_amount = 65 if char.isupper() else 97
+            result += chr((ord(char) - shift_amount + shift) % 26 + shift_amount)
+        else:
+            result += char
+    return result
+
+text = "python is fun!"
+shift = 5
+encrypted_text = caesar_cipher(text, shift)
+print("Encrypted text:", encrypted_text)