I have not done a lot of Perl programming other than quick knock-offs for system-specifc tasks, so my Perl knowledge is pretty basic. I created a program which goes out and runs a CGI program which returns some data. From there I can do what I want with it. The program works fine. However, I wanted to run this continuously, with a sleep of say 3 minutes. When I put the code in a while loop, it runs, but it returns the exact same data as before, even if I know that the data is different (which I can check by calling it in a browser). Obviously I need to clear something out, but I am at a loss as to what to do. 
#!perl -w
use Win32::Internet;
my $addr = "http://somewebaddress.com/prog.cgi?parameters";
my $INET = new Win32::Internet();
my $url = $INET->FetchURL($addr);
$INET->Close();
print $url;
... etc ...

[download]
This works fine. However, if I try enclosing it in a while ... 
#!perl -w
use Win32::Internet;
my $addr = "http://somewebaddress.com/prog.cgi?parameters";
while (1)
{
  my $INET = new Win32::Internet();
  my $url = $INET->FetchURL($addr);
  $INET->Close();
  print $url;
  sleep 180;
}

[download]
It runs fine, but the data ($url) is exactly the same - and I know it isn't. Obviously I need to clear the variables out. I've tried setting them to undef before the sleep but that doesn't have any effect. Appreciate any guidance.

In reply to How to Properly Clear Variables for reuse in a loop by Anonymous Monk

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