#include <avr/io.h>

#define XTAL		16000000L	//Crystal Freq.
#define TIMER_CLOCK     2       // Toggling Freq.

int main(void)
{    
	DDRD = _BV(PD5); // set OC1A pin as output, required for output 
	TCCR1A = _BV(COM1A0); // enable toggle OC1A output on compare 
	TCCR1B = _BV(CS10) | _BV(CS11)  | _BV(WGM12); // prescaler=64, clear timer/counter on compareA match                
	OCR1A = ((XTAL/64)/(2*TIMER_CLOCK)) - 1; // preset timer1 high/low byte
	/*
	 * Initialisation done, LED will now flash without executing any code !
	 */
	for(;;){}    // loop forever
}