//00515,светоидиод
int ledPin_1 = 13;
int ledPin_2 = A0;
void setup() {
  // put your setup code here, to run once:
pinMode(ledPin_1, OUTPUT);
pinMode(ledPin_2, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(ledPin_1, HIGH);
delay(2000);
digitalWrite(ledPin_1, LOW);
digitalWrite(ledPin_2, HIGH);
delay(2000);
digitalWrite(ledPin_2, LOW);
}