double(sometimes more) click green flag to fully restart Q&A rotate 1st arm W&S move 2nd arm across 1st arm E&D rotate 2nd arm R&F rotate 3rd arm don't touch the black,
youtube.com/watch?v=QDlsDCOJ6OE explained tan , cos, and sin .I made this beqqcause felt like playing with trig just because it relates to the code I used for an arm.