different layout depend on how many party member in group?

[devilArt]

hey guys
I want to use different layouts on 5 men party, 10 men raid, and 25 men raid

something like this

if member < 6 then -- in party
    do some style to layout
elseif member >5 and member < 11 then -- in raid
    do some style to layout
end

is there some easy way to do this?
I tried read elvui's code, but my skill is really poor, cant understand at all~~
can you guys show me some simple and easy example
thanks in advance