#include <JeeLib.h>  // Include library containing low power functions
int led = 13;
ISR(WDT_vect) { Sleepy::watchdogEvent(); } // Setup for low power waiting

void setup() {                
  pinMode(led, OUTPUT);     
}

void loop() {
  digitalWrite(led, HIGH);
  Sleepy::loseSomeTime(1000);      // Instead of delay(1000); 
  digitalWrite(led, LOW);
  Sleepy::loseSomeTime(1000);      // Instead of delay(1000);
}