int rly1 = 16;
int rly2 = 14;
int rly3 = 12;
int rly4 = 13;
int rly5 = 15;
int rly6 = 0;
int rly7 = 4;
int rly8 = 5;
int LED_chip = 5;

int RLY = 0;
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(rly1, OUTPUT);
  pinMode(rly2, OUTPUT);
  pinMode(rly3, OUTPUT);
  pinMode(rly4, OUTPUT);
  pinMode(rly5, OUTPUT);
  pinMode(rly6, OUTPUT);
  pinMode(rly7, OUTPUT);
  pinMode(rly8, OUTPUT);
  Serial.begin(9600);
}

// the loop function runs over and over again forever
void loop() {
  blinkRLY(rly1, "relay 1");  
  blinkRLY(rly2, "relay 2");  
  blinkRLY(rly3, "relay 3");  
  blinkRLY(rly4, "relay 4");  
  blinkRLY(rly5, "relay 5");  
  blinkRLY(rly6, "relay 6");  
  blinkRLY(rly7, "relay 7");  
  blinkRLY(rly8, "relay 8");  
}

void blinkRLY(uint8 RLY, String pesan) {
  Serial.println(pesan);
  digitalWrite(RLY, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);              // wait for a second
  digitalWrite(RLY, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);
}