void setup()
{
  volatile char *dirf,*outf;
  dirf=0x30; outf=0x31;
  volatile char *dirk,*ink;
  dirk=0x107; ink=0x106;
  *dirf=0xFF; *dirk=0x00;
  volatile char switches;
 loop: while(1)
  {
    switches = *ink;
    if((switches & 1 )== 1) // 1th switch 
    {
      while(1)
      {
        switches = *ink;
        if((switches & 8) == 8) // 4th switch 
        {
          while(1)
          {
            switches = *ink;
            if((switches & 64) == 64)// 7th switch 
            {
              while(1)
              {
                switches = *ink;
                if((switches & 32) == 32)// 6th switch 
                {
                  *outf=128;
                  for(volatile long n=0;n<=100000;n++);//delay
                  *outf=0;
                  goto loop;
                }
              }
            }
          }
        }
      }
    }
  }
}

void loop()
{

}