#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);

void setup() {
  lcd.init();
  lcd.backlight();
  Serial.begin(9600);
  pinMode(5, INPUT_PULLUP);
  pinMode(6, INPUT_PULLUP);
}

int poc1 = 2;
int poc2 = 2;
bool press1 = true;
bool press2 = true;

void loop() {
  lcd.print("Raketa A:");
  lcd.setCursor(0,1);
  lcd.print("Raketa B:");
  lcd.setCursor(0,0);

  if(digitalRead(5) == LOW && press1 == true && poc1 % 2 == 0){
    press1 = false;
    lcd.setCursor(10,0);
    lcd.print("On");
    poc1--;
    vymaz(12,0);
  }
  else if(digitalRead(5) == LOW && press1 == true && poc1 % 2 == 1){
    press1 = false;
    lcd.setCursor(10,0);
    lcd.print("Off");
    poc1++;
    vymaz(13,0);
  }

  if(digitalRead(5) == HIGH && press1 == false)
    press1 = true;


//----------------------------------------------------------------------//

  if(digitalRead(6) == LOW && press2 == true && poc2 % 2 == 0){
    press2 = false;
    lcd.setCursor(10,1);
    lcd.print("On");
    poc2--;
    vymaz(12,1);
  }
  else if(digitalRead(6) == LOW && press2 == true && poc2 % 2 == 1){
    press2 = false;
    lcd.setCursor(10,1);
    lcd.print("Off");
    poc2++;
    vymaz(13,1);
  }

  if(digitalRead(6) == HIGH && press2 == false)
    press2 = true;
}

void vymaz(int x,int y){
  for(int i = x;i<16;i++){
    lcd.setCursor(i,y);
    lcd.print(" ");
  }
}