int Led1=7;
int Led2=4;
int Button=2;
int Button2=8;
int Button3=12;
void setup() {
  // put your setup code here, to run once:
pinMode(Led1,OUTPUT);
pinMode(Led2,OUTPUT);
pinMode(Button, INPUT);
pinMode(Button2, INPUT);
pinMode(Button3, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
int Buttonstates = digitalRead(Button);

if (Buttonstates == HIGH){
  digitalWrite(Led1, LOW);
  if(Led1==LOW){
    digitalWrite(Led2, HIGH);
  }
  else{
    digitalWrite(Led2, LOW);
  }
}
else{
  digitalWrite(Led1, HIGH);
}
int Buttonstates2 = digitalRead(Button2);

if (Buttonstates2 == HIGH){
  digitalWrite(Led2, LOW);
  if(Led2==LOW){
    digitalWrite(Led1, HIGH);
  }
  else{
    digitalWrite(Led1, LOW);
  }
}
else{
  digitalWrite(Led2, HIGH);
}
int Buttonstates3 = digitalRead(Button3);

if (Buttonstates3 == HIGH){
  digitalWrite(Led1, LOW);
  digitalWrite(Led2, LOW);
}
else{
  digitalWrite(Led1,HIGH);
  digitalWrite(Led2, HIGH);
}
}