If you are new to Scratch, press the green flag. Wait at least 8 seconds after the cat goes inside the Lamborghini in order to see the supercar start up and rev.
Aventador startup: https://www.youtube.com/watch?v=CigPKhmPmZQ Image: http://amagico.com/sports-car-back-view-background-1-hd-wallpaper.html My 1st project. Please comment if something needs to be improved.