Stenciling with a free-form stencil is popular with faux-finishers and muralists.  It is a creative style of stenciling that lets you become the designer!  Free-form work allows you to judge the size, perspective and positioning of all of the elements. The stencil is designed using small components, that when "layered" or "built upwards" allows you to create designs on a small scale, or fill an entire wall.

If you don't want to paint a mural on the wall because you may move and have to leave it.....consider stenciling it on a piece of canvas.  The canvas can be mounted and framed, or suspended from a decorative rod.  When moving day arrives, your artwork goes with you.