Allow use of mic Start playing music! The "Adjust" variable changes the responsiveness of the curves (to a degree; you may have to change your computer's audio input volume).
I just discovered a use of the "make block" function of Scratch: run without screen refresh. Now this project runs better, and doesn't even need turbo mode. Edit: exploring projects on the website, I discovered a very simple yet ingenious use of the "stamp" script, allowing me to add a cool effect to this project.