Press the mouse cursor. Click randomly once or twice at the end. Reload the page if you want to activate the sequence again. Geez, this took a lot of figuring. Not being able to use the "when flag is pressed" block was difficult. And yes, this uses all ten blocks, and no other blocks are used for the script.
The template's from @speakvisually The design studio's the design studio. http://scratch.mit.edu/studios/520375/ I just realized how that pun fails.