diff --git a/Codes/Arduino.ino b/Codes/Arduino.ino
index 6668163..41b0e33 100644
--- a/Codes/Arduino.ino
+++ b/Codes/Arduino.ino
@@ -1,3 +1,10 @@
+/*
+Hello world program for Arduino.
+Instructions:
+
+Upload your code, open the serial monitor, and set the baud rate to 9600.
+*/
+
 void setup() {
   Serial.begin(9600);
   Serial.println("Hello World");