diff --git a/NFC_Reader.py b/NFC_Reader.py
index df200a6..9db376e 100644
--- a/NFC_Reader.py
+++ b/NFC_Reader.py
@@ -2,8 +2,8 @@ import time
 import nfc
 import subprocess
 import requests
-import asyncio
 import oled
+from threading import Thread
 
 url="http://172.16.1.105/api/"
 
@@ -21,7 +21,7 @@ def onTagSense(tag):
     response = requests.post(f"{url}tag_id", data={"id":id})
     try:
         if response.json()["mode"] == "balance" or response.json()["mode"] == "message":
-            #oled.Balance(response.json()["username"], response.json()["balance"])
+            # subprocess? Thread(target=oled.Balance, args=(response.json()["username"], response.json()["balance"])).run()
             return True
     except:
         None
diff --git a/oled.py b/oled.py
index 413502f..1cc6ac9 100644
--- a/oled.py
+++ b/oled.py
@@ -18,5 +18,10 @@ async def Balance(user_name, balance):
     await time.sleep(5)
     await clear()
 
+def Error(code):
+    clear()
+    display.text("!!!!ERROR!!!!", 50, 0 (255,255,255), size=2)
+    display.text(str(code), 50, 10, (255,255,255), size=2)
+
 if __name__ == "__main__":
     Balance("Test", -255555)