Responsive Image Gallery
Resize the browser window to see the effect.
This example use media queries to re-arrange the images on different screen sizes: for screens larger than 700px wide, it will show four images side by side, for screens smaller than 700px, it will show two images side by side. For screens smaller than 500px, the images will stack vertically (100%).
This gallery based on W3C School's Responsive Image Gallery.