两个按键，按第一个灯闪，按第二个灯灭，实测成功

volatile int bleled;
volatile int ledblin;
volatile int ledblinkp;
volatile boolean ledstate;
void setup(){
bleled = 0;
ledblinkp = millis();
ledblin = 0;
ledstate = false;
pinMode(2, INPUT);
pinMode(3, INPUT);
pinMode(13, OUTPUT);
}
void loop(){
pinMode(2, INPUT_PULLUP);
pinMode(3, INPUT_PULLUP);
if (digitalRead(2) == LOW) {
bleled = 1;
ledstate = true;
}
if (digitalRead(3) == LOW) {
bleled = 2;
}
if (bleled == 2) {
digitalWrite(13,LOW);
}
ledblin = millis();
if (ledblin - ledblinkp >= 500) {
ledstate = !ledstate;
ledblinkp = ledblin;
if (bleled == 1 && ledstate == true) {
digitalWrite(13,HIGH);
} else {
digitalWrite(13,LOW);
}
}
}