Help with walk behaviour

Hi,

I use the livestream section to do my live lessons i lately looked at a video of okay samurai which is this one : https://www.youtube.com/watch?v=vbNXq8NTIWk&t=393s
i implemented this into a lesson i made it worked really good but now i need some help with another lesson i am making you should watch this video since its hard to exmplain with just words: https://www.youtube.com/watch?v=fW_VGjxJJnk
can you please help me ,Thank you