//define pins
#define relayPin PB1
#define RunledPin PB2

//define timing variables
unsigned long onTime = 3000; //time in milliseconds for the device to stay on
unsigned long offTime = 2000; //time in milliseconds for the device to stay off
unsigned long currentTime;
unsigned long previousTime = 0;

//define state variable
int relayState = LOW;

void setup() 
{
  pinMode(relayPin, OUTPUT); //set relay pin as output
  pinMode(RunledPin, OUTPUT); //pin2 Output
}

void loop()
 {
  Runled_interval(1000); // led blink time
  currentTime = millis(); //get current time
  
  //turn on relay if off time has passed
  if (relayState == LOW && currentTime - previousTime >= offTime) {
    relayState = HIGH;
    digitalWrite(relayPin, relayState);
    previousTime = currentTime;
  }

  //turn off relay if on time has passed
  if (relayState == HIGH && currentTime - previousTime >= onTime) {
    relayState = LOW;
    digitalWrite(relayPin, relayState);
    previousTime = currentTime;
  }
  
}
void Runled_interval (int interval){
   static long prevMill = 0;
   if ((millis() - prevMill) >= interval){ 
    prevMill = millis(); 
    digitalWrite(RunledPin, !digitalRead(RunledPin));
    }
    }