#include <LiquidCrystal_I2C.h>
#define sensor0 A0
#define sensor1 A1
#define sensor2 A2
#define sensor3 A3
LiquidCrystal_I2C lcd(0x27, 16, 2); // set the LCD address to 0x27 for a 16 chars and 2 line display

byte sky[] = {
  B00000,
  B00000,
  B00100,
  B01110,
  B00100,
  B00000,
  B00000,
  B00000
};
byte ground[] = {
  B00000,
  B00000,
  B00000,
  B00000,
  B11111,
  B11111,
  B00000,
  B00000
};
byte koreanG[] = {
  B00000,
  B00000,
  B11111,
  B00001,
  B00001,
  B00001,
  B00001,
  B00000
};
byte koreanN[] = {
  B00000,
  B00000,
  B10000,
  B10000,
  B10000,
  B10000,
  B11111,
  B00000
};
byte koreanD[] = {
  B00000,
  B00000,
  B11111,
  B10000,
  B10000,
  B10000,
  B11111,
  B00000
};
byte koreanB[] = {
  B00000,
  B10001,
  B10001,
  B11111,
  B10001,
  B10001,
  B11111,
  B00000
};
byte koreanS[] = {
  B00000,
  B00100,
  B00100,
  B01010,
  B01010,
  B10001,
  B00000,
  B00000
};
byte koreanJ[] = {
  B00000,
  B00000,
  B11111,
  B00010,
  B00100,
  B01010,
  B10001,
  B00000
};

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.createChar(0, koreanG);  // ㄱ
  lcd.createChar(1, koreanB); // ㅂ
  lcd.createChar(2, sky); // +
  lcd.createChar(3, koreanN);  // ㄴ
  lcd.createChar(4, koreanS); // ㅅ
  lcd.createChar(5, ground); // ㅡ
  lcd.createChar(6, koreanD); // ㄷ
  lcd.createChar(7, koreanJ); // ㅈ
  lcd.clear();
}

void loop() {
  ////////////적외선 센서 /////////////
  float volts0 = analogRead(sensor0) * 0.0048828125;
  int distance0 = 13 * pow(volts0, -1);
  float volts1 = analogRead(sensor1) * 0.0048828125;
  int distance1 = 13 * pow(volts1, -1);
  float volts2 = analogRead(sensor2) * 0.0048828125;
  int distance2 = 13 * pow(volts2, -1);
  float volts3 = analogRead(sensor3) * 0.0048828125;
  int distance3 = 13 * pow(volts3, -1);
  ///////////////////////// 적외선 1번 /////////////////////////////
  if (4 <= distance0 && distance0 <= 30) {
    if (4 <= distance0 && distance0 <= 12) {
      lcd.write("I"); // ㅣ
      delay(500);
    }
    else if (13 <= distance0 && distance0 <= 21) {
      lcd.write(byte(0)); //
      delay(500);
    }
    else if (22 <= distance0 && distance0 <= 30) {

      lcd.write(byte(1)); //
      delay(500);
    }
  }
  /////////////////////////////적외선 2번 /////////////////////////
  if (4 <= distance1 && distance1 <= 30) {
    if (4 <= distance1 && distance1 <= 12) {
      lcd.write(byte(2)); //
      delay(500);
    }
    else if (13 <= distance1 && distance1 <= 21) {
      lcd.write(byte(3)); //
      delay(500);
    }
    else if (22 <= distance1 && distance1 <= 30) {
      lcd.write(byte(4)); //
      delay(500);
    }
  }
  //////////////////////// 적외선 3번 //////////////////////////////
  if (4 <= distance2 && distance2 <= 30) {
    if (4 <= distance2 && distance2 <= 12) {
      lcd.write(byte(5)); // ㅡ
      delay(500);
    }
    else if (13 <= distance2 && distance2 <= 21) {
      lcd.write(byte(6)); // ㅇ
      delay(500);
    }
    else if (22 <= distance2 && distance2 <= 30) {
      lcd.write(byte(7));
      delay(500);
    }
  }
  //////////////////////// 적외선 4번 ////////////////////////////////
  if (4 <= distance3 && distance3 <= 30) {
    if (4 <= distance3 && distance3 <= 12) {
      lcd.print("O"); //o
      delay(500);
    }
    else if (13 <= distance3 && distance3 <= 21) {
      lcd.print("W"); // ㅈ
      lcd.clear();
      delay(500);
    }
    else if (22 <= distance3 && distance3 <= 30) {
      lcd.clear();
      delay(500);
    }
  }
}

제가 적외선 거리 감지 센서를 이용해서 거리에 따라서 LCD에 출력하는 글자를 다르게 해서 키보드 같은 걸 만들어 보고 있는데 적외선 감지 센서 오류가 많고 lcd 에 출력하다가 다음줄 넘어갈 때 너무 늦게 넘어갑니다. 코드에 문제점이 있을까요?