Cloud you teach me what is wrong?

Hi experts!!
I made a program what if PathOfTravel is over than 50m, it’s changed color to red, and if PathOfTravel is shorter than 50m, it’s gonna change back to PathOfTravel’s green(like change the length of PathOfTravel (over 50m⇒shorter than 50m)).
But, that’s program didn’t work when PathOfTravel’s length(over 50m) change to shorter than 50m.
So, Cloud you teach me What is wrong on the program?
Thank you for your help!!

Hello @shimizu3L5L3 something here maybe…