Find House for li-Crab!!

const int buttonPinUp = 12;
const int buttonPinLeft = 11;
const int buttonPinRight = 10;

const int ledPinye1 = 5;
const int ledPingre1 = 4;
const int ledPinye2 = 3;
const int ledPingre2 = 2;
const int ledPinblue1 = 6;
const int ledPinblue2 = 7;
const int ledPinred1 = 8;
const int ledPinred2 = 9;
const int ledPinred3 = 13;

int LastButtonUpState = HIGH;
int LastButtonLeftState = HIGH;
int LastButtonRightState = HIGH;

int LedState = 0; 
/* In the beginning, we set the variable LedState to 0. 
Here's the programming logic of this game: 
  if the button of the correct direction was clicked when LedState is 0,
    LedState became 1. With "if loop", we configurate the state of all Leds:
    which are on and which are off in condition that LedState is 1.
  if the button of the correct direction was clicked when LedState is 1,
    LedState became 2. With "if loop", we configurate the state of all Leds:
    which are on and which are off in condition that LedState is 2.
  if...
  ...*/
//LedState can be imagined as a configuration.
//All the "configurations" are setted up below.
//LedState = 0 -->configuation number 0: the first led on the way is lit
//LedState = 1 -->configuation number 1: the second led on the way is lit

void setup(){
  Serial.begin(9600);
  pinMode(buttonPinUp,INPUT_PULLUP);  /*INPUT_PULLUP turns on the internal
  resistor which has the guarantied resistance between 20kΩ and 50kΩ.
  For more information, consult Arduino official website's digital pins
  section: https://docs.arduino.cc/learn/microcontrollers/digital-pins */
  pinMode(buttonPinLeft, INPUT_PULLUP);
  pinMode(buttonPinRight, INPUT_PULLUP);
  
  pinMode(ledPinye1, OUTPUT);
  pinMode(ledPinye2, OUTPUT);
  pinMode(ledPingre1, OUTPUT);
  pinMode(ledPingre2, OUTPUT);
  pinMode(ledPinblue1, OUTPUT);
  pinMode(ledPinblue2, OUTPUT);
  pinMode(ledPinred1, OUTPUT);
  pinMode(ledPinred2, OUTPUT);
  pinMode(ledPinred3, OUTPUT);
  
  digitalWrite(ledPinye1, HIGH); /*When arduino is powered,ledPinyel pin
  is on to lighten the LED which shows the player's initial position.*/
  digitalWrite(ledPingre1, LOW);
  digitalWrite(ledPinye2, LOW);
  digitalWrite(ledPingre2, LOW);
  digitalWrite(ledPinblue1, LOW);
  digitalWrite(ledPinblue2, LOW);
  digitalWrite(ledPinred1, LOW);
  digitalWrite(ledPinred2, LOW);
  digitalWrite(ledPinred3, LOW);
}

void loop(){
 int buttonstate = 0; /*create a new variable "buttonstate
 and set its initial value to 0*/
  
 buttonstate = digitalRead(buttonPinUp); /*get how many time the up-button
                                          was clicked*/
 if(buttonstate == LOW && 
    buttonstate != LastButtonUpState){  /*If the buttonstate is bigger than
                                    the before(the up-button was clicked)*/ 
    if(LedState == 7) /*If when the up-button i clicked, LedState is 7
                      (we are at step 7/the configuration 7)*/
      LedState = 8;  /*LedState will be 8(the configuration of each LedState
                      are below)*/
    if(LedState == 5)
      LedState = 6;
    else if(LedState == 3)
      LedState = 4;
    else if(LedState == 0)
      LedState = 1;
 
 }   
 LastButtonUpState = buttonstate; /*updat the value of LastButtonUpState in
 order to make them egal to each other before the new click of button*/
 
 buttonstate = digitalRead(buttonPinLeft); /*get how many time the 
                                              left-button was clicked*/
 if(buttonstate == LOW && 
    buttonstate != LastButtonLeftState){ /*If the buttonstate is bigger than
                                    the before(the left-button was clicked)*/
     if(LedState == 4) 
      LedState = 5;
     else if(LedState == 2)
      LedState = 3;
     else if(LedState == 1)
      LedState = 2;
 }   
 LastButtonLeftState = buttonstate;
  
 buttonstate = digitalRead(buttonPinRight); 
 if(buttonstate == LOW && 
    buttonstate != LastButtonRightState){   
       if(LedState == 6)
        LedState = 7;
 }   
 LastButtonRightState = buttonstate;

 //print constantly the present value of each variable on the serial monitor
 Serial.print(LedState);   
 Serial.print(" ");
 Serial.print(LastButtonUpState);
 Serial.print(" ");
 Serial.print(LastButtonLeftState);
 Serial.print(" ");
 Serial.println(LastButtonRightState);
 
 
 //////////////////Here comes the "configurations" of when LedState = 0 to 8/
 ///////////////////////////////////////////////////////////////////////////
 
 if(LedState == 8){                      //configuation number 8
   digitalWrite(ledPinye1, LOW); 
   digitalWrite(ledPingre1, LOW);
   digitalWrite(ledPinye2, LOW);
   digitalWrite(ledPingre2, LOW);
   digitalWrite(ledPinblue1, LOW);
   digitalWrite(ledPinblue2, LOW);
   digitalWrite(ledPinred1, LOW);
   digitalWrite(ledPinred2, LOW);
   digitalWrite(ledPinred3, HIGH);
 }
  
 if(LedState == 7){                     //configuration number 7
   digitalWrite(ledPinye1, LOW); 
   digitalWrite(ledPingre1, LOW);
   digitalWrite(ledPinye2, LOW);
   digitalWrite(ledPingre2, LOW);
   digitalWrite(ledPinblue1, LOW);
   digitalWrite(ledPinblue2, LOW);
   digitalWrite(ledPinred1, LOW);
   digitalWrite(ledPinred2, HIGH);
   digitalWrite(ledPinred3, LOW);
 }
  
 if(LedState == 6){                     //configuration number 6
   digitalWrite(ledPinye1, LOW); 
   digitalWrite(ledPingre1, LOW);
   digitalWrite(ledPinye2, LOW);
   digitalWrite(ledPingre2, LOW);
   digitalWrite(ledPinblue1, LOW);
   digitalWrite(ledPinblue2, LOW);
   digitalWrite(ledPinred1, HIGH);
   digitalWrite(ledPinred2, LOW);
   digitalWrite(ledPinred3, LOW);
 }
  
 if(LedState == 5){                     //configuration number 5
   digitalWrite(ledPinye1, LOW); 
   digitalWrite(ledPingre1, LOW);
   digitalWrite(ledPinye2, LOW);
   digitalWrite(ledPingre2, LOW);
   digitalWrite(ledPinblue1, LOW);
   digitalWrite(ledPinblue2, HIGH);
   digitalWrite(ledPinred1, LOW);
   digitalWrite(ledPinred2, LOW);
   digitalWrite(ledPinred3, LOW);
 }
  
 if(LedState == 4){                     //configuration number 4
   digitalWrite(ledPinye1, LOW); 
   digitalWrite(ledPingre1, LOW);
   digitalWrite(ledPinye2, LOW);
   digitalWrite(ledPingre2, LOW);
   digitalWrite(ledPinblue1, HIGH);
   digitalWrite(ledPinblue2, LOW);
   digitalWrite(ledPinred1, LOW);
   digitalWrite(ledPinred2, LOW);
   digitalWrite(ledPinred3, LOW);
 }  
   
 if(LedState == 3) {                     //configuration number 3
   digitalWrite(ledPinye1, LOW); 
   digitalWrite(ledPingre1, LOW);
   digitalWrite(ledPinye2, LOW);
   digitalWrite(ledPingre2, HIGH);
   digitalWrite(ledPinblue1, LOW);
   digitalWrite(ledPinblue2, LOW);
   digitalWrite(ledPinred1, LOW);
   digitalWrite(ledPinred2, LOW);
   digitalWrite(ledPinred3, LOW);
 }  
  
 if(LedState == 2) {                     //configuration number 2
   digitalWrite(ledPinye1, LOW); 
   digitalWrite(ledPingre1, LOW);
   digitalWrite(ledPinye2, HIGH);
   digitalWrite(ledPingre2, LOW);
   digitalWrite(ledPinblue1, LOW);
   digitalWrite(ledPinblue2, LOW);
   digitalWrite(ledPinred1, LOW);
   digitalWrite(ledPinred2, LOW);
   digitalWrite(ledPinred3, LOW);
 }  
  
 if(LedState == 1) {                     //configuration number 1  
   digitalWrite(ledPinye1, LOW); 
   digitalWrite(ledPingre1, HIGH);
   digitalWrite(ledPinye2, LOW);
   digitalWrite(ledPingre2, LOW);
   digitalWrite(ledPinblue1, LOW);
   digitalWrite(ledPinblue2, LOW);
   digitalWrite(ledPinred1, LOW);
   digitalWrite(ledPinred2, LOW);
   digitalWrite(ledPinred3, LOW);
 } 
  
 if(LedState == 0) {                     //the initial configuration   
   digitalWrite(ledPinye1, HIGH); 
   digitalWrite(ledPingre1, LOW);
   digitalWrite(ledPinye2, LOW); 
   digitalWrite(ledPingre2, LOW);
   digitalWrite(ledPinblue1, LOW);
   digitalWrite(ledPinblue2, LOW);
   digitalWrite(ledPinred1, LOW);
   digitalWrite(ledPinred2, LOW);
   digitalWrite(ledPinred3, LOW);
 }
  
}