Arduino hello world

arduino/HelloWorld/HelloWorld.ino

@@ -0,0 +1,15 @@
+const unsigned int LED_PIN = 13;
+const unsigned int PAUSE = 500;
+
+
+void setup() {
+    pinMode(LED_PIN, OUTPUT);
+}
+
+
+void loop() {
+    digitalWrite(LED_PIN, HIGH);
+    delay(PAUSE);
+    digitalWrite(LED_PIN, LOW);
+    delay(PAUSE);
+}