I'm looking for a technique to wrap text around images while maintaining responsiveness. The two column designs I currently create have empty space beneath images if a paragraph of text extends beyond its bottom edge. This is fine most of the time but I have cases where I need text to flow under images.

I'm looking for this, where the blue represents text, and orange represents an image. When viewed on a mobile device, the image should stack above the text.

Example: http://imgur.com/793IWQH

A code snippet would be ideal.