#define up A1
#define down A2
#define left A3
#define right A4

#define red 2
#define green 3
#define yellow 4
#define blue 5







void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  pinMode(up, INPUT);
  pinMode(down, INPUT);
  pinMode(left, INPUT);
  pinMode(right, INPUT);
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(blue, OUTPUT);



  digitalWrite(up, LOW);
  digitalWrite(down, LOW);
  digitalWrite(left, LOW);
  digitalWrite(right, LOW);


  digitalWrite(red, LOW);
  digitalWrite(green, LOW);
  digitalWrite(yellow, LOW);
  digitalWrite(blue, LOW);

}

void loop() {
  // put your main code here, to run repeatedly:

  if (digitalRead(up) ==HIGH){
  
    digitalWrite(red, HIGH);

  }

  if (digitalRead(down) ==HIGH){
  
    digitalWrite(green, HIGH);
    
  }

  if (digitalRead(left) ==HIGH){
  
    digitalWrite(yellow, HIGH);
    
  }

  if (digitalRead(right) ==HIGH){
  
    digitalWrite(blue, HIGH);
    
  }



}