I was able to get your extension running in Scratch 2. It works great! I have a slide dimmer on a1 moving the cat back and forth which works fine. When I add a button to a0 to have the cat meow when the button is pressed as well, the digital read always seems to be false (even when the button is pressed). Perhaps, I’m doing something wrong. I tried using an if block with wrapped in forever and also tried the hat block (when a0 = HIGH). Thanks again for such a great extension.