Nested function using inline AMPscript

I'm new with AMPscript. I'm trying to make my AMPscript look better
Original script:

%%[
var @pointsBalance, @memberLevel
set @pointsBalance = AttributeValue("Total")
if @pointsBalance > 1000 then
    set @memberLevel = "VIP"
elseif  500< @pointsBalance and @pointsBalance <=1000 then
    set @memberLevel = "Gold"
else
    set @memberLevel = "Standard"
endif
]%%

<p>You are a valued %%=v(@memberLevel)=%% member.<p>

I expected something like:

https://developer.salesforce.com/docs/atlas.en-us.noversion.mc-programmatic-content.meta/mc-programmatic-content/iif.htm

That means we just need to write the script in one line.

One more question. At first in the second condition I wrote

elseif  500< @pointsBalance <=1000 then
...

And it didn't work. Any suggestions to make the code better? Thank you in advance.