int BASE = 2 ; //第一顆 LED 接的 I/O 腳
int NUM = 6; //LED 的總數
void setup()
{
for (int i = BASE; i < BASE + NUM; i ++)
{
pinMode(i, OUTPUT); //設定數字I/O腳為輸出
}
}
void loop()
{
for (int i = BASE; i < BASE + NUM; i ++)
{
digitalWrite(i, LOW); //設定數字I/O腳輸出為"低"，即逐漸關燈
delay(200); //延遲
}
for (int i = BASE; i < BASE + NUM; i ++)
{
digitalWrite(i, HIGH); //設定數字I/O腳輸出為"高"，即逐漸開燈
delay(200); //延遲
}
}