void loop()
{
digitalWrite(ledPin12, HIGH); // sets the LED on
delay(50); // waits for a second
digitalWrite(ledPin11, HIGH); // sets the LED on
delay(50);
digitalWrite(ledPin12, LOW); // sets the LED off
digitalWrite(ledPin10, HIGH); // sets the LED on
delay(50); // waits for a second
digitalWrite(ledPin11, LOW); // sets the LED off
digitalWrite(ledPin9, HIGH); // sets the LED on
delay(50); // waits for a second
digitalWrite(ledPin10, LOW); // sets the LED off
digitalWrite(ledPin8, HIGH); // sets the LED on
delay(50); // waits for a second
digitalWrite(ledPin9, LOW); // sets the LED off
digitalWrite(ledPin7, HIGH); // sets the LED on
delay(50); // waits for a second
digitalWrite(ledPin8, LOW); // sets the LED off
delay(50); // waits for a second
digitalWrite(ledPin7, LOW); // sets the LED off
}