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Выводит квадрат

#include <Keypad.h>
#include <LiquidCrystal.h>  
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // (RS, E, DB4, DB5, DB6, DB7)
const byte ROWS = 4; 
const byte COLS = 3; 

char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};

byte rowPins[ROWS] = {5, 4, 3, 2}; 
byte colPins[COLS] = {8, 7, 6};    

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup() {
  lcd.begin(16,2);
  Serial.begin(9600);
 // lcd.setCursor(0,0);
  //lcd.print("123");
  }
  
void loop() {
  char key = keypad.getKey();
  
  if (key){
    lcd.setCursor(0,0);
    lcd.print(key);
    //Serial.println(key);
  }
}