int i,j; //i預計顯示字行0~9,j預計用於顯示何段LED、pin腳位
byte num[10]={
  0xf9,   //1
  0xb0,   //3
  0x92,   //5
  0xf8,   //7
  0x90,   //9
  0xf9,   //1
  0xb0,   //3
  0x92,   //5
  0xf8,   //7 
  0x90   //9
};
int seg[]={15,2,4,5,18,19,21,22};
void setup()  
{
  for(j=0;j<9;j++)
    pinMode(seg[j],OUTPUT);
}

void loop()
{
  for (i=0;i<10;i++)
  {
    for(j=0;j<9;j++)
    {
      if(bitRead(num[i],j)) //
        digitalWrite(seg[j], HIGH);
      else
        digitalWrite(seg[j], LOW);
    }
  delay(1000);
  }
}