int ledRed = 22;
int ledBlue = 23;

void setup() {
  pinMode(ledRed, OUTPUT);
  pinMode(ledBlue, OUTPUT);
}


void loop() {
  digitalWrite(ledRed, HIGH);
  delay(500);
  digitalWrite(ledRed, LOW);
  delay(500);

  digitalWrite(ledBlue, HIGH);
  delay(500);
  digitalWrite(ledBlue, LOW);
  delay(500);
}