H()
{
   fire( pin1,pin2,pin3,pin4,pin5,pin6,pin7);
   fire( oo,  oo,  oo,  pin4,oo,  oo,  oo  ); //oo means pin not fired
   fire( oo,  oo,  oo,  pin4,oo,  oo,  oo  );
   fire( oo,  oo,  oo,  pin4,oo,  oo,  oo  );
   fire( pin1,pin2,pin3,pin4,pin5,pin6,pin7);
}