//---  Blinks an LED on and off repeatedly at 1 sec. intervals.
//
//  Setup: Wire an LED from Digital Pin 7 thru a 330 ohm resistor to ground
//         (330 = orange-orange-brown)
//------------------------------------------------------------

  
void setup() {              // Only do once at startup           
  pinMode(7, OUTPUT);       // initialize the digital pin as an output (for LED.)
}

void loop()  {              // repeat forever    
  digitalWrite(7, HIGH);      // turn LED on: 
  delay(1000);                // delay for 1000 milliseconds (1 second)

  digitalWrite(7, LOW);      // turn LED off:
  delay(1000);               // delay for 1 second
}