//display 0 to 9
#define DELAY 1000000

void setup() 
{
volatile char* dir1;
dir1 = 0x30;
*dir1 = 0xff;
}

void loop() 
{
  volatile char* data1 =(volatile char*) 0x31;
  volatile long i;
  volatile char j;
  volatile char arr[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

  for(j=0;j<10;j++)
  {
    *data1 = arr[j];
    for(i=0;i<DELAY;i++);
  }

}