Galloping horse neon light driver

neon_gallop.ino

// Galloping horse display
// Instructables Build Night with Cool Neon

const int p[] = {13, 12};  // List of pins with connected EL wires
const int pn = 2;  // number of connected wires
const int delay = 400;  // delay between display updates

void setup() {
  delay(200);  
  for( int i = 0 ; i < pn ; i++ ) { // declare all the Cool Neon channels as outputs
      pinMode(p[i], OUTPUT);
      digitalWrite(p[i], HIGH);
  }
}

void loop() {
  digitalWrite(p[0], HIGH);
  digitalWrite(p[1], LOW);
  delay(delay);
  digitalWrite(p[0], LOW);
  digitalWrite(p[1], HIGH);
  delay(delay);  
}