#include <avr/sleep.h>                                                
const byte LED=9;                                                   
 
void setup()
{digitalWrite(2,HIGH);}                                           
  
void loop()                                                        
{set_sleep_mode(SLEEP_MODE_PWR_DOWN);  
sleep_enable();                         
attachInterrupt(0,wake,FALLING);     
EIFR=bit(INTF0);                     
interrupts();                          
sleep_cpu();                           
AKCE();}                                
  
void wake()                            
{sleep_disable();}                      
  
void AKCE()                             
{pinMode(LED,OUTPUT);
 digitalWrite(LED,HIGH);
 delay(10000);
 digitalWrite(LED,LOW);}