const int redled = 1;
const int blueled = 2;
const int blinktime = 1000;
const int button = 3;


void setup() {
  // put your setup code here, to run once:
  pinMode(redled, OUTPUT);
  pinMode(blueled, OUTPUT);
  pinMode(button, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (digitalRead(button) == HIGH) {
    digitalWrite(redled, HIGH);
    digitalWrite(blueled, LOW);
    delay(blinktime);
    digitalWrite(redled, LOW);
    digitalWrite(blueled, HIGH);
    delay(blinktime);
  }
  else {
    digitalWrite(redled, LOW);
    digitalWrite(blueled, LOW);
  }
}