arduino lunar surface timer

const int output = 13;
const int highDuration = 50;
const int lowDuration = 30;

void setup() {                
  pinMode(output, OUTPUT);
  Serial.begin(9600);  
}

void wait(int seconds) {
  for(int i=0; i<seconds; i++) {
   delay(1000);
   Serial.print(i, DEC);
   Serial.print("/");
   Serial.println(seconds, DEC);
  }
}

void loop() {
  Serial.println("-----ON------");
  digitalWrite(output, HIGH);
  wait(highDuration);
  
  Serial.println("-----OFF-----");
  digitalWrite(output, LOW);
  wait(lowDuration);
}