//initialize pins
const int ledRed = 9;
const int swRed = 2;
const int ledGr = 10;
const int swGr = 12;
const int ledBl = 6;
const int swBl = 8;
const int ledOr = 5;
const int swOr = 7;

void setup() {
  // set up pinouts: led's output, switches input
  pinMode(ledRed, OUTPUT);
  pinMode(swRed, INPUT);
  pinMode(ledGr, OUTPUT);
  pinMode(swGr, INPUT);
  pinMode(ledBl, OUTPUT);
  pinMode(swBl, INPUT);
  pinMode(ledOr, OUTPUT);
  pinMode(swOr, INPUT);

}

void loop() {
  // switch circuit 5v pull-down resistor trigger
  int stateButton = digitalRead(swRed);
  if(stateButton == HIGH){
    digitalWrite(ledRed, HIGH);
  }
  else{
    digitalWrite(ledRed, LOW);
  }
}