void setup() {
  // put your setup code here, to run once:
pinMode(2, OUTPUT);//red
pinMode(3, OUTPUT);//blue
pinMode(4, OUTPUT);//green
pinMode(5, INPUT);
pinMode(6, INPUT);
pinMode(7, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
int sw1=digitalRead(5);
int sw2=digitalRead(6);
int sw3=digitalRead(7);
if((sw1==1)&&(sw2==0)&&(sw3==0))
{
  //digitalWrite(2, LOW);
  //digitalWrite(3, LOW);
  digitalWrite(4, HIGH);
}
if((sw1==0)&&(sw2==1)&&(sw3==0))
{
  digitalWrite(2, HIGH);
  digitalWrite(4, HIGH);
  //digitalWrite(3, LOW);
}
if((sw1==0)&&(sw2==0)&&(sw3==1))
{
  //digitalWrite(2, LOW);
  digitalWrite(3, HIGH);
  digitalWrite(4, HIGH);
}
else
if((sw1==0)&&(sw2==0)&&(sw3==0))
{
  
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
}

}