#include <LiquidCrystal.h>

byte linha=0;
byte coluna=0;

LiquidCrystal monitor(2,3,4,5,6,7);//(RS,E,DB4,DB5,DB6,DB7)

void setup(){
   monitor.begin(20,4);//(colunas,linhas) do LCD
   monitor.print("");
}

void loop(){
   monitor.setCursor(coluna,linha);
   monitor.print("*");
   if(analogRead(A1)==0 and coluna<19 ){
    coluna++;
    delay(100);
    monitor.clear();
   }

   if(analogRead(A1)==1023 and coluna>0){
    coluna--;
    delay(100);
    monitor.clear();
   }

   if(analogRead(A0)==0 and linha<3){
    linha++;
    delay(100);
    monitor.clear();
   }

   if(analogRead(A0)==1023 and linha>0){
    linha--;
    delay(100);
    monitor.clear();
   }
}