diff --git a/a/arduino.ino b/a/arduino.ino
index b046dd87..d99dad3c 100755
--- a/a/arduino.ino
+++ b/a/arduino.ino
@@ -1,4 +1,12 @@
-void setup(){
-        Serial.begin(9600);
-        Serial.println("Hello world!");
+void setup() {
+  // put your setup code here, to run once:
+  // initialize serial communication at 9600 bits per second:
+  Serial.begin(9600);
+  //print message serial monitor
+  Serial.println("Hello world!");
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+
 }