//Press 0th switch glow 8 LED's
void setup() {
volatile char *dirf,*dirk;
dirf=0x30;
*dirf=0xFF;
dirk=0x107;
*dirk=0x00;
}
void loop() {
  volatile char *outf,*ink,x;
  volatile long i;
  outf=0x31;
  *outf=0x00;
  ink=0x106;
  *ink=0x00;
  while(1){
  x=*ink;
  if((x&0x01)==0x01)
  *outf=0xFF;
  for(i=0;i<100000;i++);
  }
}