Press the button or spacebar when the red line is on a green dot. Set your mode (1= ez, 2=nm, 3=ch 4=hd) then hold click for four seconds to start.
Made for fun. Also practice for the "It's been a while project" I beg you, please try that project! https://scratch.mit.edu/projects/858880493 Thanks to Zelnus on Roblox for the idea!