Remote Control for Home Appliances

#define r1 A0
int relay1 = LOW;
#define r2 A1
int relay2 = LOW;
#define r3 A2
int relay3 = LOW;
#define r4 A3
int relay4 = LOW;

int Button1 = 9;
int Button2 = 10;
int Button3 = 11;
int Button4 = 12;

void setup()
{
  pinMode(r1, OUTPUT);
  pinMode(r2, OUTPUT);
  pinMode(r3, OUTPUT);
  pinMode(r4, OUTPUT);

  pinMode(Button1, INPUT);
  pinMode(Button2, INPUT);
  pinMode(Button3, INPUT);
  pinMode(Button4, INPUT);

  digitalWrite(r1, HIGH);
  digitalWrite(r2, HIGH);
  digitalWrite(r3, HIGH);
  digitalWrite(r4, HIGH);

}
void loop()
{

  if (digitalRead(Button1) == HIGH)
  {
    relay1 = ~ relay1;
    digitalWrite(r1, relay1);
    delay(250);
  }
  if (digitalRead(Button2) == HIGH)
  {
    relay2 = ~ relay2;
    digitalWrite(r2, relay2);
    delay(250);
  }
  if (digitalRead(Button3) == HIGH)
  {
    relay3 = ~ relay3;
    digitalWrite(r3, relay3);
    delay(250);
  }

  if (digitalRead(Button4) == HIGH)
  {
    relay4 = ~ relay4;
    digitalWrite(r4, relay4);
    delay(250);
  }


}