finalData = JSON.parse(data.data.arena);
                for(var i = 0, len=finalData.length; i<len; i++){
                  if(arena[finalData[i].row]==null){
                    var tmp = [];
                    tmp[finalData[i].column] = 'a';
                    arena[finalData[i].row] = tmp;
                  }else{
                    var tmp = arena[finalData[i].row];
                    tmp[finalData[i].column] = 'a';
                    arena[finalData[i].row] = tmp;
                  }

                }

                for(var x = 0, lenx=arena.length; x<lenx; x++){
                  if(arena[x]!=null){
                    var tmpstr = "";
                    for(var y = 0, leny = arena[x].length; y<leny; y++){
                      if(arena[x][y]==undefined) tmpstr += '_';
                      else tmpstr += 'a';
                    }
                    arena[x] = tmpstr;
                  }
                }
                 arena.clean(undefined);
                 console.log(offset);
                 createArena(arena);
            });
}

Array.prototype.clean = function(deleteValue) {
  for (var i = 0; i < this.length; i++) {
    if (this[i] == deleteValue) {
      this.splice(i, 1);
      i--;
      offset++;
    }
  }
  return this;
};