#define BLUE 19
#define RED 18
#define YELLOW 5
int btn = 15;
int count = 0;

void setup() {
  //put your code here, to run once;
  pinMode(BLUE, OUTPUT);
  pinMode(RED, OUTPUT);
  pinMode(YELLOW, OUTPUT);
  pinMode(btn, INPUT);
}

void loop() {







  if(digitalRead(btn) == 1){
    if(count==0){
     digitalWrite(BLUE, HIGH);
     delay(1000);
     digitalWrite(RED, HIGH);
     delay(2000);
     digitalWrite(YELLOW, HIGH);
     count++;
    } 
    else if(count==1){
      digitalWrite(BLUE, LOW);
      digitalWrite(RED, LOW);
      digitalWrite(YELLOW, LOW);
      count=0;
      delay(500);
    }
  }
}