uint8_t led1 = 12, led2 = 4;
int previousMillis1 = 0, currentMillis1 = 0, previousMillis = 0;
int previousMillis2 = 0, currentMillis2 = 0;
int delay1 = 100, delay2 = 1000;

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  Serial.begin(9600);


}

void loop() {
  currentMillis1 = millis();
  Serial.println(currentMillis1 - previousMillis);
  //(500);
  if ((currentMillis1 - previousMillis)<= 5000){

    if ((currentMillis1 - previousMillis1)>= delay1){
      digitalWrite(led1,!digitalRead(led1));
      previousMillis1 = currentMillis1;
    }
  
  }

  if ((currentMillis1 - previousMillis) >= 5000 && (currentMillis1 - previousMillis) <= 10000){

    if ((currentMillis1 - previousMillis1)>= delay2){
      digitalWrite(led1,!digitalRead(led1));
      previousMillis1 = currentMillis1;
      
    }
    previousMillis = millis();
  }
  

  currentMillis2 = millis();
  if (currentMillis2 <= 5000){

    if ((currentMillis2 - previousMillis2)>= delay2){
      digitalWrite(led2,!digitalRead(led2));
      previousMillis2 = currentMillis2;
    }
  
  }

  if (currentMillis2 >= 5000 && currentMillis2 <= 10000){

    if ((currentMillis2 - previousMillis2)>= delay1){
      digitalWrite(led2,!digitalRead(led2));
      previousMillis2 = currentMillis2;
    }
  
  }


}