int Relay_in1 = 3 ;
int LED1 = 2 ;
int sw1= 4;

int Relay_in2 = 5 ;
int LED2 = 8 ;
int sw2= 6;

int Relay_in3 = 11 ;
int LED3 = 12 ;
int sw3= 9;

int Relay_in4 = 10 ;
int LED4 = 1 ;
int sw4= 7;

void setup() {
  Serial.begin(9600) ;
pinMode( Relay_in1, OUTPUT);
pinMode( LED1, OUTPUT);
pinMode( sw1, INPUT);
Serial.println(" Press sw For On ") ;

pinMode( Relay_in2, OUTPUT);
pinMode( LED2, OUTPUT);
pinMode( sw2, INPUT);
Serial.println(" Press sw For On ") ;

pinMode( Relay_in3, OUTPUT);
pinMode( LED3, OUTPUT);
pinMode( sw3, INPUT);
Serial.println(" Press sw For On ") ;

pinMode( Relay_in4, OUTPUT);
pinMode( LED4, OUTPUT);
pinMode( sw4, INPUT);
Serial.println(" Press sw For On ") ;

}

void loop() {
  int ATTC_sw1 = digitalRead(sw1) ;
if (ATTC_sw1==LOW) {
  Serial.println("LED1 ON"); 
digitalWrite(Relay_in1, HIGH);//ถ้าสวิตช์1ถูกกด
}else {digitalWrite(Relay_in1,LOW);
}
delay(10);

 int ATTC_sw2 = digitalRead(sw2) ;
if (ATTC_sw2==LOW) {
  Serial.println("LED2 ON"); 
digitalWrite(Relay_in2, HIGH);//ถ้าสวิตช์1ถูกกด
}else {digitalWrite(Relay_in2,LOW);
}
delay(10);

 int ATTC_sw3 = digitalRead(sw3) ;
if (ATTC_sw3==LOW) {
  Serial.println("LED3 ON"); 
digitalWrite(Relay_in3, HIGH);//ถ้าสวิตช์1ถูกกด
}else {digitalWrite(Relay_in3,LOW);
}
delay(10);

 int ATTC_sw4 = digitalRead(sw4) ;
if (ATTC_sw4==LOW) {
  Serial.println("LED4 ON"); 
digitalWrite(Relay_in4, HIGH);//ถ้าสวิตช์1ถูกกด
}else {digitalWrite(Relay_in4,LOW);
}
delay(10);


}