/* The slash asterisk denotes the beginning of a multi-line comment field the asterisk slash denotes the end of a multi-line comment field. The comments are ignored by the compiler and does not add to the run time or overhead of the program. Lesson_4_Blink GoldSTEM tm 2-21-2016 Turns on board LED (L) at pin 13 on for one second, then off for one second, repeatedly. */ // is also a comment field but it ends at the end of the line. // the setup function runs once when you press reset or power the board void setup() { // initialize digital pin 13 as an output. pinMode(13, OUTPUT); } // the loop function runs over and over again forever void loop() { digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digitalWrite(13, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second }