Follow the in-game instructions How to add this to your project: 1. Drag the sprite "messagebox" into your backpack 2. Go to one of your projects and drag the sprite into it 3. If you want a different sprite to display the box, drag the first three custom blocks into that sprite.
Made the font myself (using vector positions) Capital letter detection originally made by @blazzike: https://scratch.mit.edu/projects/69708304