Not a paradox, but still mind-blowing as ****.
Each pixel in your screen has the possibility of being red, green, blue, or off. Your screen is made up of a finite number of pixels, however many they might be. Therefore, there are a finite number of images that your screen can display. However, the number of combinations is incomprehensibly large. Because of the good resolution of modern screens, literally any image you can imagine is one of those combinations.
And theoretically, if you went through each possible combination (Pixel #1 Red, Pixel #2 off.... etc.), you would eventually run through every imaginable image. Pictures of you at the Grand Canyon with your family, without your family, and with literally every combination of every person who has ever and ever will exist, and even people who don't. Pictures that, when sequenced, are the frames to a video of Emma Watson beating the ever living **** out of a bear on live television. Pictures that show the future, pictures of people from our past living in today's society, and each of these pictures from every possible angle and through good cameras, bad cameras, cameras with rain on the lens, etc.
I guess it kind of seems like a paradox since the possibilities seem as infinite as our imaginations, yet there are only a finite number of combinations your screen can provide.