#define YPB 5
#define RPB 6
#define RLED 12
#define YLED 11

void setup() {
  // put your setup code here, to run once:
  // Serial.begin(115200);
  pinMode(YPB, INPUT_PULLUP);
  pinMode(RPB, INPUT_PULLUP);
  pinMode(YLED, OUTPUT);
  pinMode(RLED, OUTPUT);
}

int counter=0;

void loop() {
  // put your main code here, to run repeatedly:
  int rpb = digitalRead(RPB);
  if (rpb == LOW) {
    if (digitalRead(RLED))  // LOW 0 false , HIGH 1 true 5V
      digitalWrite(RLED, LOW);
    else
      digitalWrite(RLED, HIGH);
    delay(200); //delay 10ms * 20 次

  }

  if (digitalRead(YPB) == LOW) {
    digitalWrite(YLED, HIGH);
    counter = 500;
  }

  if (counter>0) {
    delay(10);
    counter--;
    if (counter == 0 )
       digitalWrite(YLED, LOW);
  }

  counter = 100 delay 50ms 1ms 100ms 5000+100 = 5100ms
  counter = 500 delay 10ms 1ms 500ms 5000+500 = 5500ms
 
 

}