need help with Tidy Plates (health plates/thread plates)

hello,
I'm using the lates version of tidy plates with the 'quarte damage' theme,
what i want is to show the plates by thread, when the mob is neutral i want the plate to be yellow, when it is hostile i want it to be red, but I also want the colour of the bar to change when a mob reaches low health, like 20%, is it possible with this addon?

i know i can change the health bar colour under 'health bar mode' to either 'by thread' or 'by health', but as i said i would like to have both