It is not entirly clear if you are talking about a mapping or a script function. I assume a script for now.
If (loopcount = 1)
begin
$Variable1=value1;
$Variable2=value1;
end;
else if (loopcount = 2)
begin
$Variable1=value2;
$Variable2=value2;
end;
else if (loopcount = 3)
begin
$Variable1=value3;
$Variable2=value3;
end;