diff --git a/arduino/sketchDistanceSerial-Ultrasonic.ino b/arduino/sketchDistanceSerial-Ultrasonic.ino
index a40adb7..df14921 100644
--- a/arduino/sketchDistanceSerial-Ultrasonic.ino
+++ b/arduino/sketchDistanceSerial-Ultrasonic.ino
@@ -1,6 +1,9 @@
 #include "Ultrasonic.h"
-Ultrasonic capteur(8,9); // Trig et Echo
+Ultrasonic sensor(8,9); // Trig et Echo
  
+// defines variables
+int distance; // variable for the distance measurement
+
 void setup() {
   Serial.begin(9600);
   pinMode (11, OUTPUT);
@@ -8,8 +11,9 @@ void setup() {
 }
 
 void loop () {
-  int dist = capteur.Ranging(CM);
-  Serial.print(dist);
+  distance = sensor.Ranging(CM);
+  Serial.print("Distance: ");
+  Serial.print(distance);
   Serial.println(" cm");
 
   delay(100); // 100 ms