#define buttonPin 25
#define LEDPin 26
#define LedPin 27 
int buttonSter = LOW ; //當前狀態 
int lastbutton = LOW ; //上一次的狀態
int 
unsigned long buttonTime = 0 ; 
unsigned long Time = 0 ;
bool led = LOW ; 
bool LEDstate1 = LOW; //LED當前狀態
void setup() {
  pinMode(buttonPin , INPUT_PULLUP);
  pinMode(LEDPin , OUTPUT);
  pinMode(LedPin , OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int reading = digitalRead(buttonPin); //讀取按鈕當前的狀態
  int time = millis();
  if(reading != lastbutton){//如果狀態跟上一次不符 然後就紀錄時間
    buttonTime = millis();
  }
  if((millis()-buttonTime) >= 50){//如果減完超過50ms認定穩定
    if(reading != buttonSter){//如果偵測有一次跟上次不一樣久就更新buttonSter
      buttonSter = reading;
    if(buttonSter == LOW){//如果buttonSter=LOW就讓LED切換型態變成亮
      led = !led;
      digitalWrite( LEDPin ,led );//顯示led
      if(led == HIGH){//led=HIGH就顯示led亮
        Serial.println("led亮");
      }
    }else if (led == LOW){//led=LOW就顯示led滅
        Serial.println("led滅");
    }  
  }
}

//LED
  lastbutton = reading ; //讀取現在狀態
  if(time - Time > 100){//判斷是否超過100毫秒
    Time = time ;//更新上一次的時間點
    LEDstate1 = !LEDstate1 ;//切換LED型態
    digitalWrite(LedPin , LEDstate1);//亮滅
  }
}