This is from the (apparently) beloved "how to build anything" mit class... See https://vimeo.com/454404808 https://vimeo.com/454404808 at the 9:25 and at the 2

This is from the (apparently) beloved "how to build anything" mit class... See https://vimeo.com/454404808 https://vimeo.com/454404808 at the 9:25 and at the 28:36 timestamps.