const int LED_1 = 2;
const int LED_2 = 3;
const int LED_3 = 4;
const int LED_4 = 5;
const int LED_5 = 6;
const int LED_6 = 7;
const int LED_7 = 8;

#define BUTTON_1 12
#define BUTTON_2 13

const int buzzer = 9;
int left = 0;
int right = 0;
int position = 4;
int level = 1;
int highscore = 1;
long speed = 1000;
long previousMillis = 0;
long previousMillis2 = 0;
long currentMillis;
long delayMillis = 1200;
long buttonMillis = 1200;
long hardmode1;
long hardmode2;
long hardmode3;
long timer;
long toneb = 100;

void setup() {
  Serial.begin(9600);
  hardmode1 = 7500;
  hardmode2 = 20000;
  hardmode3 = 40000;
  pinMode(buzzer,OUTPUT);
  pinMode(LED_1, OUTPUT);
  pinMode(LED_2, OUTPUT);
  pinMode(LED_3, OUTPUT);
  pinMode(LED_4, OUTPUT);
  pinMode(LED_5, OUTPUT);
  pinMode(LED_6, OUTPUT);
  pinMode(LED_7, OUTPUT);

  pinMode(BUTTON_1, INPUT_PULLUP);
  pinMode(BUTTON_2, INPUT_PULLUP);

  digitalWrite(LED_1, HIGH);
  digitalWrite(LED_7, HIGH);
  delay(500);
  digitalWrite(LED_1, LOW);
  digitalWrite(LED_7, LOW);
  digitalWrite(LED_2, HIGH);
  digitalWrite(LED_6, HIGH);
  delay(500);
  digitalWrite(LED_2, LOW);
  digitalWrite(LED_6, LOW);
  digitalWrite(LED_3, HIGH);
  digitalWrite(LED_5, HIGH);
  delay(500);
  digitalWrite(LED_3, LOW);
  digitalWrite(LED_5, LOW);
  digitalWrite(LED_4, HIGH);
  delay(500);
  digitalWrite(LED_1, HIGH);
  digitalWrite(LED_7, HIGH);
  delay(500);
  digitalWrite(LED_1, LOW);
  digitalWrite(LED_7, LOW);
  delay(500);
  digitalWrite(LED_1, HIGH);
  digitalWrite(LED_7, HIGH);
  delay(500);
  digitalWrite(LED_1, LOW);
  digitalWrite(LED_7, LOW);
  }

int ButtonState1 = HIGH;
int ButtonState2 = HIGH;

void loop() {
   
  int value1 = digitalRead((BUTTON_1));
  int value2 = digitalRead((BUTTON_2));
  unsigned long currentMillis = millis();

if (ButtonState1 != value1) {
    ButtonState1 = value1;
    if (value1 == LOW) {
      if(currentMillis - buttonMillis > 200){
      left ++;
      right --;
      buttonMillis = currentMillis;
      }
    if (left == 0 && right == 0){left = 1;}
    }
}

if (ButtonState2 != value2) {
    ButtonState2 = value2;
    if (value2 == LOW) {
      if(currentMillis - buttonMillis > 200){
      left --;
      right ++;
      buttonMillis = currentMillis;
    }
      if (left == 0 && right == 0){right = 1;}
    }
  }

if(left == 0 && right == 0){
  unsigned long currentMillis = millis();
  previousMillis = currentMillis;
  previousMillis2 = currentMillis;
}

if (left >= 1){
if(currentMillis - delayMillis > speed/left){
position --;
delayMillis = currentMillis;
}
}

if (right >= 1){
if(currentMillis - delayMillis > speed/right){
position ++;
delayMillis = currentMillis;
}
}

if (position == 0){

Serial.println("Game Over!");
Serial.println(" ");
tone(buzzer, toneb);
digitalWrite(LED_1, HIGH);
if ((currentMillis - previousMillis2) >= 30000){
digitalWrite(LED_2, HIGH);
if ((currentMillis - previousMillis2) >= 60000){
digitalWrite(LED_3, HIGH);
if ((currentMillis - previousMillis2) >= 90000){
digitalWrite(LED_4, HIGH);}
digitalWrite(LED_5, HIGH);}
digitalWrite(LED_6, HIGH);}
digitalWrite(LED_7, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(LED_1, LOW);
digitalWrite(LED_2, LOW);
digitalWrite(LED_3, LOW);
digitalWrite(LED_4, LOW);
digitalWrite(LED_5, LOW);
digitalWrite(LED_6, LOW);
digitalWrite(LED_7, LOW);
delay(500);
tone(buzzer, toneb);
digitalWrite(LED_1, HIGH);
if ((currentMillis - previousMillis2) >= 30000){
digitalWrite(LED_2, HIGH);
if ((currentMillis - previousMillis2) >= 60000){
digitalWrite(LED_3, HIGH);
if ((currentMillis - previousMillis2) >= 90000){
digitalWrite(LED_4, HIGH);}
digitalWrite(LED_5, HIGH);}
digitalWrite(LED_6, HIGH);}
digitalWrite(LED_7, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(LED_1, LOW);
digitalWrite(LED_2, LOW);
digitalWrite(LED_3, LOW);
digitalWrite(LED_4, LOW);
digitalWrite(LED_5, LOW);
digitalWrite(LED_6, LOW);
digitalWrite(LED_7, LOW);
if (level > highscore){
highscore = level;
}
Serial.print("Your Score: ");
Serial.println(level);
Serial.print("Highscore: ");
Serial.println(highscore);
Serial.println(" ");
delay(500);
position = 4;
left = 0;
right = 0;
speed = 1000;
level = 1;
previousMillis = currentMillis;
previousMillis2 = currentMillis;
hardmode1 = random(5000, 10000);
hardmode2 = random(15000, 30000);
hardmode3 = random(35000, 50000);
}

if (position == 1){
digitalWrite(LED_1, HIGH);
digitalWrite(LED_2, LOW);
}
if (position == 2){
digitalWrite(LED_1, LOW);
digitalWrite(LED_2, HIGH);
digitalWrite(LED_3, LOW);
}
if (position == 3){
digitalWrite(LED_2, LOW);
digitalWrite(LED_3, HIGH);
digitalWrite(LED_4, LOW);
}
if (position == 4){
digitalWrite(LED_3, LOW);
digitalWrite(LED_4, HIGH);
digitalWrite(LED_5, LOW);
}
if (position == 5){
digitalWrite(LED_4, LOW);
digitalWrite(LED_5, HIGH);
digitalWrite(LED_6, LOW);
}
if (position == 6){
digitalWrite(LED_5, LOW);
digitalWrite(LED_6, HIGH);
digitalWrite(LED_7, LOW);
}
if (position == 7){
digitalWrite(LED_6, LOW);
digitalWrite(LED_7, HIGH);
}
if (position == 8){
Serial.println("Game Over!");
Serial.println("");
tone(buzzer, toneb);
digitalWrite(LED_1, HIGH);
if ((currentMillis - previousMillis2) >= 30000){
digitalWrite(LED_2, HIGH);
if ((currentMillis - previousMillis2) >= 60000){
digitalWrite(LED_3, HIGH);
if ((currentMillis - previousMillis2) >= 90000){
digitalWrite(LED_4, HIGH);}
digitalWrite(LED_5, HIGH);}
digitalWrite(LED_6, HIGH);}
digitalWrite(LED_7, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(LED_1, LOW);
digitalWrite(LED_2, LOW);
digitalWrite(LED_3, LOW);
digitalWrite(LED_4, LOW);
digitalWrite(LED_5, LOW);
digitalWrite(LED_6, LOW);
digitalWrite(LED_7, LOW);
delay(500);
tone(buzzer, toneb);
digitalWrite(LED_1, HIGH);
if ((currentMillis - previousMillis2) >= 30000){
digitalWrite(LED_2, HIGH);
if ((currentMillis - previousMillis2) >= 60000){
digitalWrite(LED_3, HIGH);
if ((currentMillis - previousMillis2) >= 90000){
digitalWrite(LED_4, HIGH);}
digitalWrite(LED_5, HIGH);}
digitalWrite(LED_6, HIGH);}
digitalWrite(LED_7, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(LED_1, LOW);
digitalWrite(LED_2, LOW);
digitalWrite(LED_3, LOW);
digitalWrite(LED_4, LOW);
digitalWrite(LED_5, LOW);
digitalWrite(LED_6, LOW);
digitalWrite(LED_7, LOW);
if (level > highscore){
highscore = level;
}
Serial.print("Your Score: ");
Serial.println(level);
Serial.print("Highscore: ");
Serial.println(highscore);
Serial.println(" ");
delay(500);
position = 4;
left = 0;
right = 0;
speed = 1000;
level = 1;
previousMillis = currentMillis;
previousMillis2 = currentMillis;
hardmode1 = random(5000, 10000);
hardmode2 = random(15000, 30000);
hardmode3 = random(35000, 50000);
}

if (((currentMillis - previousMillis2) >= hardmode1) && position == 4 ){
 if (left >= 1){
   left = 0;
   right = 1;
   hardmode1 = 9999999;
   }
  else if (right >= 1){
   left = 1;
   right = 0;
   hardmode1 = 9999999;
   }
}
if (((currentMillis - previousMillis2) >= hardmode2) && position == 4 ){
 if (left >= 1){
   left = 0;
   right = 1;
   hardmode1 = 9999999;
   }
  else if (right >= 1){
   left = 1;
   right = 0;
   hardmode2 = 9999999;
   }
}
if (((currentMillis - previousMillis2) >= hardmode3) && position == 4 ){
 if (left >= 1){
   left = 0;
   right = 1;
   }
  else if (right >= 1){
   left = 1;
   right = 0;
   hardmode3 = 9999999;
   }
}


if (currentMillis - previousMillis > 10000) {
 if(left == 1 || right == 1){
 previousMillis = currentMillis;
 speed = speed*0.8;
 level ++;
 Serial.println("Level Up!");
 Serial.print("Level: ");
 Serial.println(level);
 Serial.println(" ");
 if (level > highscore){
 Serial.println("New Highscore!");
 Serial.println(" ");
 }}}}