The severe, gray, concrete walls of prison sometimes give way to unexpected bursts of color and potential moments of inspiration. The Massachusetts Department of Correction revealed some of these in a recent public records release containing photographs of several motivational posters hanging on its prison walls.

After a couple decades of wholesomeness, terror, and wholesome terror, the National Security Agency’s security posters took a turn for the mellow in the ’70s. Here’s five of our favorites.

In 1973, still coming down from the harshed mellow of Watergate, a Central Intelligence Agency officer came up with what they felt would be the perfect solution to lagging morale and lackluster operation security: a motivational poster contest. The results, apparently produced in-house, were exceedingly a product of a their time and environment - and are now available for you desktop wallpaper needs.