Go to Cloud data LISTS https://scratch.mit.edu/projects/18268174/#player and hit < to encode. type in 1, hit enter, then type your message and hit enter. Copy (ctrl+c) the code and come back here. Click on your favorite cat and it will ask you for your message. Just paste (ctrl+v) it and hit enter. Before all that, check if there is an item in the message box. If so, click on the message, and hit ctrl+a and then ctrl+c. Then go to https://scratch.mit.edu/projects/18268174/#player and hit > to decode. Paste your code and your message you got will apear! Also, if there are many codes in the message box, hit clear, and it will clear it!
Credits to @supermarioboss and me!