void setup() {
  // put your setup code here, to run once:
pinMode(2, INPUT);
pinMode(4, OUTPUT);
pinMode(8, INPUT);
pinMode(7, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
if (digitalRead(2) == HIGH){
digitalWrite(4, HIGH);
digitalWrite(7, LOW);
}
if (digitalRead(8) == HIGH){
digitalWrite(7, HIGH);
digitalWrite(4, LOW);
}
else{
digitalWrite(4, LOW);
digitalWrite(7, LOW);
}
}