function canMove(x,y){
  var direction = rovers[actualRover].direction;

  switch(direction){
    case 'N':
    if(grid[x - 1][y] === 'obstacle'){
      console.log('Ups! You can't forward in this direction, there is a obstacle.');
      return false;
    }else if(grid[x - 1][y].includes('rover')){
      console.log('Ups! You can't forward in this direction, there is an another Rover.');
      return false;
    }else if(grid[x - 1] <= 0){
      console.log('Ups! You can't exit outside of area!');
      return false;
    }else if(grid[x - 1][y] === null){
      return true;
    }
  }
}