#include <avr/interrupt.h>
#include <avr/sleep.h>

void setup() {
  // Define relais pins 
  pinMode(19, OUTPUT);
  pinMode(20, OUTPUT);      
}

void loop() {
  delay(2000);             // Wait for 2 seconds
  digitalWrite(19, HIGH);  // Poweron Relais #1
  delay(2000);
  digitalWrite(20, HIGH);  // Poweron Relais #2
  stop();         
}   

void stop() {
  // Send microcontroller to sleep
  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  cli();
  sleep_mode();
}