int led_main=8;
int led_1_red=2;
int led_1_green=3;
int led_2_red=4;
int led_2_green=5;
int led_3_red=6;
int led_3_green=7;


int button_main=9;
int button_1=10;
int button_2=11;
int button_3=12;

int state_main=1;
int state_1=1;
int state_2=1;
int state_3=1;

int led_1_state=0;
int led_2_state=0;
int led_3_state=0;

int led_1_gstate=1;
int led_2_gstate=1;
int led_3_gstate=1;

void setup() {
  // Serial.begin(9600);
  // Serial.println("starting");

  pinMode(led_main, OUTPUT);
  pinMode(led_1_red, OUTPUT);
  pinMode(led_1_green, OUTPUT);
  pinMode(led_2_red, OUTPUT);
  pinMode(led_2_green, OUTPUT);
  pinMode(led_3_red, OUTPUT);
  pinMode(led_3_green, OUTPUT);

  // Serial.println("leds installed");

  pinMode(button_main, INPUT_PULLUP);
  pinMode(button_1, INPUT_PULLUP);
  pinMode(button_2, INPUT_PULLUP);
  pinMode(button_3, INPUT_PULLUP);

  // Serial.println("buttons installed");
  
}

void loop() {
  randomSeed(analogRead(0));
  while(state_main==1){
    // Serial.println("main button off");
    state_main=digitalRead(button_main);
    if (led_1_state==0){
    state_1=digitalRead(button_1);
    }
    if (led_2_state==0){
    state_2=digitalRead(button_2);
    }
    if (led_3_state==0){
    state_3=digitalRead(button_3);
    }
    if (state_1==0){
      digitalWrite(led_1_red, HIGH);
      led_1_state=1;
    }
    if (state_2==0){
      digitalWrite(led_2_red, HIGH);
      led_2_state=1;
    }
    if (state_3==0){
      digitalWrite(led_3_red, HIGH);
      led_3_state=1;
    }
    if (state_1==0 && state_2==0 && state_3==0 ){
     int rand = random(3);
      if(rand==1){
        goto select1;
      }else if(rand==2){
        goto select2;
      }else{
        goto select3;
      }
    }

  }
digitalWrite(led_main, HIGH);
  while (state_main==0){
    // Serial.println("main_button_pressed");
    if(led_1_state==0){
      led_1_gstate=digitalRead(button_1);
    }
    if(led_2_state==0){
      led_2_gstate=digitalRead(button_2);
    }
    if(led_3_state==0){
      led_3_gstate=digitalRead(button_3);
    }
    if (led_1_gstate==0){
      select1:
      digitalWrite(led_1_green, HIGH);
      
      digitalWrite(led_2_red, HIGH);
      digitalWrite(led_3_red, HIGH);
      goto getout;
    }
    if (led_2_gstate==0){
      select2:
      digitalWrite(led_2_green, HIGH);
      
      digitalWrite(led_1_red, HIGH);
      digitalWrite(led_3_red, HIGH);
      goto getout;
    }
    if (led_3_gstate==0){
      select3:
      digitalWrite(led_3_green, HIGH);
      digitalWrite(led_1_red, HIGH);
      digitalWrite(led_2_red, HIGH);
      goto getout;
    }
    
  }
  getout:
  // Serial.println("end");
  
    state_main=digitalRead(button_main);
    while(state_main==1){
      state_main=digitalRead(button_main);
      
      // Serial.println("inside state main 1");
    }
    digitalWrite(led_1_red, LOW);
    digitalWrite(led_1_green, LOW);
    digitalWrite(led_2_red, LOW);
    digitalWrite(led_2_green, LOW);
    digitalWrite(led_3_red, LOW);
    digitalWrite(led_3_green, LOW);
    digitalWrite(led_main, LOW);
    
    
    state_1=1;
    state_2=1;
    state_3=1;

    led_1_state=0;
    led_2_state=0;
    led_3_state=0;

    led_1_gstate=1;
    led_2_gstate=1;
    led_3_gstate=1;

    while(state_main==0){
      state_main=digitalRead(button_main);
    }
    delay(2000);
    state_main=1;



}