const int LED1 = 12; 
const int LED2 = 13; 
int led1State = LOW; 
int led2State = LOW; 
unsigned long previousTime1 = 0; 
unsigned long previousTime2 = 0; 
const unsigned long interval1On = 1000; 
const unsigned long interval1Off = 500; 
const unsigned long interval2On = 200; 
const unsigned long interval2Off = 200; 
void setup() { 
  pinMode(LED1, OUTPUT); 
  pinMode(LED2, OUTPUT); 
  } 
  
void loop() { 
  unsigned long currentTime = millis(); 
  if (led1State == HIGH && currentTime - previousTime1 >= interval1On) {
     led1State = LOW; previousTime1 = currentTime; 
     digitalWrite(LED1, led1State); } 
     else if (led1State == LOW && currentTime - previousTime1 >= interval1Off) { 
      led1State = HIGH; previousTime1 = currentTime; 
      digitalWrite(LED1, led1State); 
} if (led2State == HIGH && currentTime - previousTime2 >= interval2On) { 
  led2State = LOW; previousTime2 = currentTime; 
  digitalWrite(LED2, led2State); 
  } else if (led2State == LOW && currentTime - previousTime2 >= interval2Off) { 
    led2State = HIGH; 
    previousTime2 = currentTime; 
    digitalWrite(LED2, led2State);
     } 
    }