#include <stdint.h>

#define DDRH  (*(volatile uint8_t*)0x101)
#define PORTH (*(volatile uint8_t*)0x102)

void setup() {
  DDRH |= (1 << 6) | (1 << 0);
}

void DELAY(void) {
  volatile uint32_t i;
  for (i = 0; i < 1000000; i++);
}

void loop() {
  PORTH |= (1 << 6) | (1 << 0);    
  DELAY();
  PORTH &= ~(1 << 6) & ~(1 << 0);  // LED OFF
  DELAY();
}