unsigned long prel  = 0;
unsigned long pre2  = 0;
unsigned long pre3  = 0;
unsigned long pre4  = 0;

unsigned long timer1 = 500;
unsigned long timer2 = 1000;
unsigned long timer3 = 2000;
unsigned long timer4 = 3000;

unsigned long current1 = 0;
unsigned long current2 = 0;
unsigned long current3 = 0;
unsigned long current4 = 0;

int led1 = 1;
int led2 = 1;
int led3 = 1;
int led4 = 1;

int state = 0;

void setup() {
  pinMode(2, INPUT_PULLUP);
  Serial.begin(115200);

  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(8, OUTPUT );

attachInterrupt( 0, blink, CHANGE);


}

void loop() {
  //////////////////led1
  current1 = millis();

  if (current1 - pre1 >= timer1) {
    Serial.println(pre1);
    pre1 = current1;

    if (led1 == LOW) {
      led1 = HIGH;
    } else {
      led1 = LOW;
    }

    digitalWrite(13, led1);
  }
  //////////////////led2

  current2 = millis();

  if (current 2 - pre2 >= timer2    ) {
    Serial.println( pre2 );
    pre2 = current2;

    if (led2 == LOW) {
      led2 = HIGH;
    } else {
      led2 = LOW;
    }

    digitalWrite(12, led2);
  }
  ///////////////////////led3
  current3 = millis();

  if (current3 - pre3 >= timer3    ) {
    Serial.println( pre3  );
    pre3 = current3;

    if (led3 == LOW) {
      led3 = HIGH;
    } else {
      led3 = LOW;
    }

    digitalWrite(11, led3);
  }
  /////////////////////led4
  current4 = millis();

  if (current4 - pre4 >= timer4   ) {
    Serial.println( pre4 );
    pre4 = current4;

    if (led4 == LOW) {
      led4 = HIGH;
    } else {
      led4 = LOW;
    }

    digitalWrite(10, led4);


  }
  digitalWrite (8, state);


}//////////////end loop

void blink(){

  state =!state;
  
  digitalWrite (8, state);

}