int sw1=2;
int sw2=3;
int sw3=4;
int sw4=5;
int led1=6;
int led2=7;
int led3=8;
int led4=9;




void setup() {
  pinMode(2, INPUT);
  pinMode(6, OUTPUT);
  pinMode(3, INPUT);
  pinMode(7, OUTPUT);
  pinMode(4, INPUT);
  pinMode(8, OUTPUT);
  pinMode(5, INPUT);
  pinMode(9, OUTPUT);
  Serial.begin(9600);


void loop() {
  if(sw1==HIGH)
  {
digitalWrite(6, HIGH);
digitalWrite(7,LOW);
digitalWrite(8, LOW);
digitalWrite(9, LOW)

  }
if(sw2==HIGH)
{
digitalWrite(6, LOW);
digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
}

if(sw3==HIGH)
{
digitalWrite(6, LOW);
digitalWrite(8, HIGH);
digitalWrite(7, LOW);
digitalWrite(9, LOW);
}

if(sw4==HIGH)
{
digitalWrite(6, LOW);
digitalWrite(9, HIGH);
digitalWrite(7, LOW);
digitalWrite(8, LOW);
}
else{
digitalWrite(6, HIGH);
digitalWrite(7, HIGH);
digitalWrite(8, HIGH);
digitalWrite(9, HIGH);

}

}