bool led_2 = false;
bool press_key = false;

int r = 10;
int g = 9;
int b = 8;

int count = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(r , OUTPUT);
  pinMode(g , OUTPUT);
  pinMode(b , OUTPUT);
  pinMode(4, INPUT_PULLUP);
}

void loop() {

  bool key = digitalRead(4);
  if (key && ! press_key){
    press_key = true;
    delay(20);
  }
  if (!key && press_key){
    press_key = false;
    delay(20);
    count = count + 1;
    if (count > 2) { 
      count = 0;
    }

  }
  if (count == 0){
    digitalWrite(10, 0);
    digitalWrite(9, 0);
    digitalWrite(8, 1);
  }
  if (count == 1){
    digitalWrite(10, 0);
    digitalWrite(9, 1);
    digitalWrite(8, 0);
  }
  if (count == 2){
    digitalWrite(10, 1);
    digitalWrite(9, 0);
    digitalWrite(8, 0);
  }
 

}