I would like to impliment a flex grid in my solution. If you look at this grid: http://tympanus.net/Development/GammaGallery/
You can see that it works fine, now what I would like to achieve is put random white squares between the pictures, so no white pictures but white squares/rectangles.
I would load the images from contentitems so that's why i can't use white images.
If anyone would have an idea how to accomplish this it would be great!