int led[] = {13,12,11,10,9};
int btn[] = {7,6,5,4,3};

void setup() {
  for (int a =0; a < 5; a++){
    pinMode(led[a], OUTPUT);
    pinMode(btn[a], INPUT);
  }
}

void loop() {
  for (int a = 0; a < 5; a++){
    digitalWrite(led[a], digitalRead(btn[a]));
  }
}