#include  <avr/io.h>
#include  <util/delay.h>


void init() {

 DDRA = 0b11111111; //Makes PORTA as Output
}

int main(void)
{
    init();
 
  while(1) //infinite loop
  { 

    PORTA = 0b10000000; //turn pin 7 on
_delay_ms(100);   //delay 100 ms


  PORTA= 0b00000000; //turn pin 7 off

  _delay_ms(100); //delay 100 ms
     
}
   }