Update Wiring example according to Get-Started on home page

examples/wiring-blink/src/main.cpp

@@ -1,21 +1,25 @@
-#ifdef ENERGIA
-	#include "Energia.h"
-#else
-	#include "Arduino.h"
-#endif
+/*
+ * Blink
+ * Turns on an LED on for one second,
+ * then off for one second, repeatedly.
+ */
 
-#ifndef LED_PIN
-	// Most Arduino boards already have a LED attached to pin 13 on the board itself
-	#define LED_PIN 13
-#endif
+#include "Arduino.h"
 
-void setup() {
-  pinMode(LED_PIN, OUTPUT);     // set pin as output
+void setup()
+{
+  // initialize digital pin 13 as an output.
+  pinMode(LED_BUILTIN, OUTPUT);
 }
 
-void loop() {
-  digitalWrite(LED_PIN, HIGH);  // set the LED on
-  delay(1000);                  // wait for a second
-  digitalWrite(LED_PIN, LOW);   // set the LED off
-  delay(1000);                  // wait for a second
+void loop()
+{
+  // turn the LED on (HIGH is the voltage level)
+  digitalWrite(LED_BUILTIN, HIGH);
+  // wait for a second
+  delay(1000);
+  // turn the LED off by making the voltage LOW
+  digitalWrite(LED_BUILTIN, LOW);
+   // wait for a second
+  delay(1000);
 }