#define F_CPU 16000000UL
#include <Arduino.h>
#include <avr/io.h>
#include <util/delay.h>

#ifdef __cplusplus
extern "C" {
#endif
   void mains();
#ifdef __cplusplus
}
#endif

void T05Delay(void)
{
	TCNT1 = 0;					  //  TCNT1= for delay of 0.5 seconds
	TCCR1B |=  (1<<CS10) | (1<<CS12);     //  Scale down the timer frequency to 8MHz/256	
	while ((TIFR1 & (1<<TOV1))==0);  // wait for TF1 to roll over
	TCCR1B = 0;						    //  Stop Timer
	TIFR1 = 1;

}

void setup(void) {
   DDRB = 0XFF;
   PORTB = 0x00;
   while (1) { T05Delay(); PORTB = ~PORTB; };
}

void loop(void) {

}