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//-----------------------------------------
//Published by IntroductionToArduino.com
//Created by Paul Illsley (www.paulillsley.com)
//Please use and share so others can enjoy
//-----------------------------------------

// defining names for UNO pins 
#define LED_A 9
#define LED_B 10
#define LED_C 11

void setup()
{
  // declaring LED_A (pin 9), LED_B (pin 10) and LED_C (pin 11) are all output pins
  pinMode(LED_A, OUTPUT);
  pinMode(LED_B, OUTPUT);
  pinMode(LED_C, OUTPUT);
}
void loop()
{
  // turning LED_A on (HIGH) and leaving all other pins off (LOW)
  digitalWrite(LED_A, HIGH);
  digitalWrite(LED_B, LOW);
  digitalWrite(LED_C, LOW);

  // delaying 1000 milliseconds (1 second)(you can adjust this value)
  delay(1000);

  // turning LED_B on (HIGH) and leaving all other pins off (LOW)
  digitalWrite(LED_A, LOW);
  digitalWrite(LED_B, HIGH);
  digitalWrite(LED_C, LOW);

  // delaying 1000 milliseconds (1 second)(you can adjust this value)
  delay(1000);

  // turning LED_C on (HIGH) and leaving all other pins off (LOW)
  digitalWrite(LED_A, LOW);
  digitalWrite(LED_B, LOW);
  digitalWrite(LED_C, HIGH);

  // delaying 1000 milliseconds (1 second)(you can adjust this value)
  delay(1000);
}
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