Measure your television. I added half an inch on each side to make sure it will fit. Cut lumber.
Build you frame.
Cut canvas or fabric. Add about 2 1/2 - 3 inches all the way around
Pull canvas or fabric tight around your frame. Secure using staple gun or tacks.
Paint your version of Picasso's art work... Or whatever your ❤desires.
Here's the finished product.