//常數宣告,共五個LED燈，五個腳位，分別是8,9,10,11,12
const byte LED1=8;
const byte LED2=9;
const byte LED3=10;
const byte LED4=11;
const byte LED5=12;

//設定五個腳位為輸出狀態
void setup()
{
  pinMode(LED1,OUTPUT);
  pinMode(LED2,OUTPUT);
  pinMode(LED3,OUTPUT);
  pinMode(LED4,OUTPUT);
  pinMode(LED5,OUTPUT);
}

//程式迴圈
void loop()
{
  digitalWrite(LED1,HIGH);//高電位點亮LED
  digitalWrite(LED2,LOW);
  digitalWrite(LED3,LOW);//其餘LOW維持低電位，就是沒點亮的狀態
  digitalWrite(LED4,LOW);
  digitalWrite(LED5,LOW);
  delay(100);//延遲100毫秒
  digitalWrite(LED1,LOW);
  digitalWrite(LED2,HIGH);
  digitalWrite(LED3,LOW);
  digitalWrite(LED4,LOW);
  digitalWrite(LED5,LOW);
  delay(100);
  digitalWrite(LED1,LOW);
  digitalWrite(LED2,LOW);
  digitalWrite(LED3,HIGH);
  digitalWrite(LED4,LOW);
  digitalWrite(LED5,LOW);
  delay(100);
  digitalWrite(LED1,LOW);
  digitalWrite(LED2,LOW);
  digitalWrite(LED3,LOW);
  digitalWrite(LED4,HIGH);
  digitalWrite(LED5,LOW);
  delay(100);
  digitalWrite(LED1,LOW);
  digitalWrite(LED2,LOW);
  digitalWrite(LED3,LOW);
  digitalWrite(LED4,LOW);
  digitalWrite(LED5,HIGH);
  delay(100);
}