Addeed comments

School/vg1/Dataelektronikk/Ultrasonic Distance.ino

@@ -2,13 +2,18 @@
 #include <Wire.h>
 #include <LiquidCrystal_I2C.h>
 
+
+// Our LCD Screen uses 0x3F, but replace this for your LCD's adress
 LiquidCrystal_I2C lcd(0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
+// Set the first number to the trigger pin, second to echo
 NewPing sonar(12,11);
 
 void setup()
 {
+  // Initializes LCD screen to a 16x2 screen
   lcd.begin(16,2);
   
+  // Blinks LCD three times, leavig the screen on at the end, easy to see start/restart happened
   for(int i = 0; i< 3; i++)
   {
     lcd.backlight();
@@ -16,15 +21,14 @@ void setup()
     lcd.noBacklight();
     delay(250);
   }
-  
   lcd.backlight();
   
+  // Sets the cursor to top left
   lcd.setCursor(0,0);
   lcd.print("Distance in cm");
 }
 
 char cm[3];
-
 void loop()
 {
   lcd.setCursor(0,1);