Put the sprite Thumbnail in your project and edit the text to your liking. If the block (timer) is used in one of your projects, do the following steps: 1. Remove the scripts in the sprite "Thumbnail" 2. Go to the project page 3. Click "Set Thumbnail" Make sure to add in the notes and credits of your projects: "Thanks to derpkitty120002 for the thumbnail template. Go to https://scratch.mit.edu/projects/1287675308/ for the template"
I made this all myself. But thanks to everyone who uses my projects for being awesome! I'm talking to you, whoever is reading this.