int LED_PIN[]={2,4,5}; //宣告LED陣列
int Buttom=14; //按鍵
int count=-1; //計算按鍵按下的次數

void setup() {
int i;
for(i=0;i<3;i++){
  pinMode(LED_PIN[i], OUTPUT);
  digitalWrite(LED_PIN[i], LOW); //讓LED初始狀態為
}
pinMode(14, INPUT_PULLUP);
}

void loop() {
while(digitalRead(14)==HIGH){
delay(50);

}

digitalWrite(LED_PIN[count%3],LOW);

count++;

digitalWrite(LED_PIN[count%3],HIGH);

while(digitalRead(14)==HIGH){
delay(50);
}

}