int Relay_in1 = 2 ;
int Relay_in2 = 3 ;
int Relay_in3 = 4 ;
int Relay_in4 = 5 ;
int LED1 = 6 ;
int LED2 = 7 ;
int LED3 = 8 ;
int LED4 = 9 ;
int sw1 = 10 ;
int sw2 = 11 ;
int sw3 = 12 ;
int sw4 = 13 ;

void setup() {
Serial.begin(115200);
pinMode(Relay_in1, OUTPUT);
pinMode(LED1, OUTPUT);
pinMode(sw1, INPUT_PULLUP);

pinMode(Relay_in2, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(sw2, INPUT_PULLUP);

pinMode(Relay_in3, OUTPUT);
pinMode(LED3, OUTPUT);
pinMode(sw3, INPUT_PULLUP);

pinMode(Relay_in4, OUTPUT);
pinMode(LED4, OUTPUT);
pinMode(sw4, INPUT_PULLUP);

Serial.println("Please Press = ");
}

void loop() {

int attc_sw1 = digitalRead(sw1);
if(attc_sw1 == LOW) {
Serial.println("LED1");
digitalWrite(Relay_in1, HIGH);   
}else{
digitalWrite(Relay_in1, LOW);  
}
delay(50);

int attc_sw2 = digitalRead(sw2);
if(attc_sw2 == LOW) {
Serial.println("LED2");
digitalWrite(Relay_in2, HIGH);   
}else{
digitalWrite(Relay_in2, LOW);  
}
delay(50);

int attc_sw3 = digitalRead(sw3);
if(attc_sw3 == LOW) {
Serial.println("LED3");
digitalWrite(Relay_in3, HIGH);   
}else{
digitalWrite(Relay_in3, LOW);  
}
delay(50);

int attc_sw4 = digitalRead(sw4);
if(attc_sw4 == LOW) {
Serial.println("LED4");
digitalWrite(Relay_in4, HIGH);   
}else{
digitalWrite(Relay_in4, LOW);  
}
delay(50);

}