Question

Have read a lot of articles, but can’t make animate function to run indefinitely. Help me please.

$.move = function(object, direction) {
    $(object).animate({
        backgroundPosition:'('+ direction +' -15000px)'
    }, 20000, 'linear', function(){ $.move(object, direction) } );
};

Answer 1

Have done!

        $('#stars1').css({backgroundPosition: '0px 0px'});
        $('#stars2').css({backgroundPosition: '0px 0px'});

        function move(object, direction){
            $(object).animate({backgroundPosition:'('+ direction +' -15000px)'}, 20000, 'linear', function(){$(object).css({backgroundPosition: '0px 0px'}); move(object, direction); });
        };

        move($("#stars1"), '-2000px');
        move($("#stars2"), '+2000px');