#define red 2
#define blue 3

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

void loop() {
    blink_one(red, 500, 1000);
    blink_one(blue,1000, 2000);
}

void blink_one (int LED, int delay_on, int delay_off) {
Serial.print("LED ="); Serial.print(LED);
Serial.print("   delay on ="); Serial.println(delay_on);
Serial.print("   delay off ="); Serial.println(delay_off);
  digitalWrite(LED, HIGH);
  delay(delay_on);
  digitalWrite(LED, LOW);
  delay(delay_off);
}