//7 segment display

void setup() 
{
  volatile char *dir;
  dir = 0x30;
  *dir = 0xff;
}

void loop() 
{
  volatile char *out;
  out = 0x31;
  *out = 0x5B;
 // for(volatile long i = 0; i<200000;i++);
  //*out = 0x00;
 
}