#include <avr/io.h>
int main ( void )
{
    DDRD = 0b01000000;
    int i = 0;
    long j = 0;
    while ( 1 )
    {
        for ( i = 0; i < 36; i++ )
        {
            PORTD = 0b00000000;
            if (i==0||i==2||i==4||i==8||i==9||i==10||i==12||i==13||i==14||i==16||i==17||i==18||i==22||i==24||i==26 )
            {   
                PORTD = 0b01000000;
            }
            for ( j = 0; j < 70175; j++ )
            {
                asm volatile ( "nop"::);
            }
         }
     }
}