#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);


int r1 = 5;

int r2 = 4;

int r3 = 3;

int r4 = 2;

int c1 = 6;

int c2 = 7;

int c3 = 8;

int c4 = 9;

int colm1;

int colm2;

int colm3;

int colm4;

int b1 = 10;
int g2 = 11;
int y3 = 12;
int R4 = 13;
void setup()
{
  lcd.init();
  lcd.backlight();
  lcd.setCursor(1, 0);
  lcd.print("Sunisa!");
  pinMode(r1, OUTPUT);

  pinMode(r2, OUTPUT);

  pinMode(r3, OUTPUT);

  pinMode(r4, OUTPUT);

  pinMode(c1, INPUT);

  pinMode(c2, INPUT);

  pinMode(c3, INPUT);

  pinMode(c4, INPUT);
  pinMode(b1, OUTPUT);
  pinMode(g2, OUTPUT);
  pinMode(y3, OUTPUT);
  pinMode(R4, OUTPUT);

  Serial.begin(9600);

  digitalWrite(c1, HIGH);

  digitalWrite(c2, HIGH);

  digitalWrite(c3, HIGH);

  digitalWrite(c4, HIGH);

}

void loop() {

  digitalWrite(r1, LOW);

  digitalWrite(r2, HIGH);

  digitalWrite(r3, HIGH);

  digitalWrite(r4, HIGH);

  colm1 = digitalRead(c1);

  colm2 = digitalRead(c2);

  colm3 = digitalRead(c3);

  colm4 = digitalRead(c4);

  if (colm1 == LOW)

  { Serial.println("1");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(3, 1);
    lcd.print("1 & BLUE");
digitalWrite(b1, 1);
    delay(200);

  }
  else if (colm2 == LOW)

  { Serial.println("2");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(3, 1);
    lcd.print("2 & Green ");
    digitalWrite(g2, 1);
    delay(200);
  }

  else if (colm3 == LOW)

  { Serial.println("3");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(3, 1);
    lcd.print("3 & Yellow");
    digitalWrite(y3, 1);
    delay(200);
  }
  else if (colm4 == LOW)

  { Serial.println("A");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("A");
    delay(200);
  }

  digitalWrite(r1, HIGH);

  digitalWrite(r2, LOW);

  digitalWrite(r3, HIGH);

  digitalWrite(r4, HIGH);

  colm1 = digitalRead(c1);

  colm2 = digitalRead(c2);

  colm3 = digitalRead(c3);

  colm4 = digitalRead(c4);

  if (colm1 == LOW)

  { Serial.println("4");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(5, 1);
    lcd.print("4 & Red");
    digitalWrite(R4, 1);
    delay(200);

  }
  else if (colm2 == LOW)

  {
    Serial.println("5");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("5");
    delay(200);
  }

  else if (colm3 == LOW)

  { Serial.println("6");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("6");
    delay(200);
  }
  else if (colm4 == LOW)

  { Serial.println("B");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("B");
    delay(200);
  }

  digitalWrite(r1, HIGH);

  digitalWrite(r2, HIGH);

  digitalWrite(r3, LOW);

  digitalWrite(r4, HIGH);

  colm1 = digitalRead(c1);

  colm2 = digitalRead(c2);

  colm3 = digitalRead(c3);

  colm4 = digitalRead(c4);

  if (colm1 == LOW)

  { Serial.println("7");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("7");
    delay(200);

  }
  else if (colm2 == LOW)

  { Serial.println("8");

    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("8"); delay(200);
  }

  else if (colm3 == LOW)

  { Serial.println("9");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("9");
    delay(200);
  }
  else if (colm4 == LOW)

  { Serial.println("C");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("C");
    delay(200);
  }
  digitalWrite(r1, HIGH);

  digitalWrite(r2, HIGH);

  digitalWrite(r3, HIGH);

  digitalWrite(r4, LOW);

  colm1 = digitalRead(c1);

  colm2 = digitalRead(c2);

  colm3 = digitalRead(c3);

  colm4 = digitalRead(c4);

  if (colm1 == LOW)

  { Serial.println("*");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("*");
    delay(200);

  }
  else if (colm2 == LOW)

  { Serial.println("0");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(3, 1);
    digitalWrite(b1, LOW);
    digitalWrite(g2, LOW);
    digitalWrite(y3, LOW);
    digitalWrite(R4, LOW);
    lcd.print("0 & LED_Off");
    delay(200);
  }

  else if (colm3 == LOW)

  { Serial.println("#");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("#");
    delay(200);
  }
  else if (colm4 == LOW)

  { Serial.println("D");
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Your Press");
    lcd.setCursor(7, 1);
    lcd.print("D");
    delay(200);
  }
}