#include <LiquidCrystal.h>

LiquidCrystal lcd(13,12,4,5,6,7);
bool lounch = true;
int lastState1 = HIGH;
int lastState2 = HIGH;

void setup() {
  lcd.begin(16,2);

  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);

  lcd.print("Rocket A: ");
  lcd.setCursor(0,1);
  lcd.print("Rocket B: ");
  lcd.home();
}

void loop() {
  int state1 = digitalRead(2);
  int state2 = digitalRead(3);

  if(state1 == LOW && lastState1 == HIGH){
    lcd.setCursor(10,0);

    if(lounch == true){
      lounch = false;
      lcd.print("ON ");
    }
    else{
      lounch = true;
      lcd.print("OFF");
    }
  } 

  if(state2 == LOW && lastState2 == HIGH){
    lcd.setCursor(10,1);

    if(lounch == true){
      lounch = false;
      lcd.print("ON ");
    }
    else{
      lounch = true;
      lcd.print("OFF");
    }
  }    

  lastState1 = state1;
  lastState2 = state2;
}