Click the green flag. Type in a letter from A to Z (capital or lowercase, it doesn't matter) and the corresponding pixels will light up to display a 5 by 5 block capital version of that letter for 5 seconds. After 5 seconds, you may type in another letter. If you do not type in a related input, the program will stop and you will have to restart it and put in a letter.
This was just a project for fun because I was bored. I know some letters look a little fat and weird, but I just did 5 by 5 blocks for all letters to keep it consistent and neatly-fitting in a square. Also, the "Q" is really messed up. Don't blame me, it's hard to make on a 5x5 grid. This literally took me 2 hours to make. Hope you enjoy! Feel free to leave a comment as long as it's not negative, and if you want, like, love, or even follow me. -ScratchEYPicasso