Best way to make a amount of ____ system

[SryupExtract (Sryup)]

Hi so im making a medical system atm, its going pretty good but Im stuck on what would be the best way to make a “blood” or “hunger” system,

heres how it currrently looks and I dont know if I should use numbervalues, Im looking for the best way to make something like this without it looking cheap lol
The red bar would be something like blood while the one on top is health.

[SryupExtract (Sryup)]

NVM, figured out I should just store it in a script.