Improving PewDiePie's Robot Dog

PewDiePie has gotten pretty good at redstone lately hasn't he? I've watched him transition from simple flying machines into walking robots very quickly, and I fear it is only a matter of time before he surpasses me.

His video: https://www.youtube.com/watch?v=G5JBZk-DiQU

Filming channel: https://www.youtube.com/user/ThatMumboJumbo2
Instagram: https://www.instagram.com/officialmumbo/
Twitter: https://twitter.com/ThatMumboJumbo