Added comments to Basics examples

build/shared/examples/1.Basics/Fade/Fade.ino

@@ -5,19 +5,22 @@
  using the analogWrite() function.
  
  This example code is in the public domain.
- 
  */
+
+int led = 9;           // the pin that the LED is attached to
 int brightness = 0;    // how bright the LED is
 int fadeAmount = 5;    // how many points to fade the LED by
 
+// the setup routine runs once when you press reset:
 void setup()  { 
   // declare pin 9 to be an output:
-  pinMode(9, OUTPUT);
+  pinMode(led, OUTPUT);
 } 
 
+// the loop routine runs over and over again forever:
 void loop()  { 
   // set the brightness of pin 9:
-  analogWrite(9, brightness);    
+  analogWrite(led, brightness);    
 
   // change the brightness for next time through the loop:
   brightness = brightness + fadeAmount;
@@ -29,3 +32,4 @@ void loop()  {
   // wait for 30 milliseconds to see the dimming effect    
   delay(30);                            
 }
+