int ledRED = 13;
int ledGREEN = 12;

int pushbuttonRED = 5;
int pushbuttonGREEN = 4;

bool redState = false;
bool greenState = false;
unsigned long redStartTime = 0;
unsigned long greenStartTime = 0;
const long blinkDuration = 1000;  // LED 点亮时间

void setup() {
  // put your setup code here, to run once:
  pinMode(ledRED, OUTPUT);
  pinMode(ledGREEN, OUTPUT);

  pinMode(pushbuttonRED, INPUT_PULLUP);
  pinMode(pushbuttonGREEN, INPUT_PULLUP);



}

void loop() {
  // put your main code here, to run repeatedly:

  /*
  if(1)  //simulate push and holding
  {
    digitalWrite(ledRED, HIGH);
    delay(1000);
    digitalWrite(ledRED, LOW);
    delay(1000);
  }
  else
  {
    digitalWrite(ledRED, LOW);
  }

  if(digitalRead(pushbuttonGREEN) == LOW)
  {
    digitalWrite(ledGREEN, HIGH);
    delay(1000);
    digitalWrite(ledGREEN, LOW);
    delay(1000);
  }
  else
  {
    digitalWrite(ledGREEN, LOW);
  }
  */
  /*
    在这种阻塞式的场景中，each pushbutton control one LED, it seem operating in a good way
    but if you holding one pushbutton then push and hold another, you will find both of 
    LEDs running in a incorrect period that is doubled by before. Because you had to 
    run one control then run another.
  */
/*----------------------------------------------------------------------------*/
  unsigned long currentMillis = millis();

  // 读取按钮状态（按下时为 LOW）
  if (digitalRead(pushbuttonRED) == LOW) {
    redState = true;
    redStartTime = currentMillis;  // 记录按下时的时间
    digitalWrite(ledRED, HIGH);
  }
  if (digitalRead(pushbuttonGREEN) == LOW) {
    greenState = true;
    greenStartTime = currentMillis;
    digitalWrite(ledGREEN, HIGH);
  }

  // 检查是否超过亮灯时间
  if (redState && currentMillis - redStartTime >= blinkDuration) {
    digitalWrite(ledRED, LOW);
    redState = false;
  }
  if (greenState && currentMillis - greenStartTime >= blinkDuration) {
    digitalWrite(ledGREEN, LOW);
    greenState = false;
  }
  
/*----------------------------------------------------------------------------*/


}