int blue = 10;
int green = 11;
int red = 9;
int pb = 3;
bool last_stat_pb = LOW;
bool curr_stat_pb = LOW;
bool led = HIGH;

bool debounce(bool last_status_pb){
  bool curr_status_pb = digitalRead(pb);
  if(last_status_pb != curr_status_pb){
    delay(5);
    curr_status_pb = digitalRead(pb);
  }
  return curr_status_pb;
}


void setup() {
  // put your setup code here, to run once:
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(blue, OUTPUT);
  digitalWrite(red, HIGH);
  digitalWrite(green, HIGH);
  digitalWrite(blue, HIGH);
  pinMode(pb, INPUT);
  digitalWrite(pb, HIGH);
}

void loop() {
  // put your main code here, to run repeatedly:
  curr_stat_pb = debounce(last_stat_pb);
  if(curr_stat_pb == LOW && last_stat_pb == HIGH){
    led = !led;
    digitalWrite(red, led);
    digitalWrite(green, led);
    digitalWrite(blue, led);
  }
  last_stat_pb = curr_stat_pb;
}