New Food Guide

On an unrelated note, food guidelines issued by the United States Department of Agriculture are very fluid, ever-changing, constantly being updated as new information presents itself on biomedicine and health.

First off, apparently they had some sort of food wheel back in 1946.
Source:  http://en.wikipedia.org/wiki/File:20111110-OC-AMW-0012_-_Flickr_-_USDAgov.jpg

Then we had the four food groups, back in the eighties.  This is the first food guide to which I had been introduced way back in the day.
Source:  evidently the only image available anywhere on the internets.
http://robertleehaller.com/foodgroups.htm

Then there was the food pyramid with blocks, in 1992.
Source:  http://en.wikipedia.org/wiki/File:USDA_Food_Pyramid.gif

Then there was the food pyramid with convergent blades.

Then there was the food pyramid with convergent blades with a dude running up the staircase on the side, in 2005.
Source:  http://en.wikipedia.org/wiki/File:MyPyramidFood.svg

Now we have harkened upon the next frontier.:
The food yin yang.  This symbolizes the delicate harmony and balance of everything.  A tangible equilibrium.

Look, we already have some demonstrative diagrams.
Sources:  internet.

Note:  This was a parody post.  The USDA has not actually released any "food yin yang" dietary guidelines.  Do not take this as medical or nutritional advice.