Node.js chronological issue

I have a problem with node.js. The commands of the program doesn't load cronologically and i don't know how to do it. I'm trying to download some images and text from database and send it with packs of 8. But node.js runs for loop and command after loop at the same time.

Here's my code:

socket.on('background_dinamically', function(data){
        connection.query("SELECT * FROM products WHERE id='"+data.cathegory+"'" , function(err, rows, fields){
            var count = 0;
            var array_elements = [];
            if(err){
                socket.emit('errorserver');
            }else{
                for (var i = rows.length - 1, count; i >= 0; i-- & count ++) {
                    array_elements.push(rows[i]);
                    if (count == 8) {
                        socket.emit('image_loading_background', [array_elements, data]);
                        count = 0;
                        array_elements = [];
                    }
                };

                if(count > 0 && count < 8 && count != 0) { 
                    socket.emit('image_loading_background', [array_elements, data]);
                }
            }
        });
    });