Was wondering, if anybody knows what wrong with this code. I want a certain set of batch files to be executed every 15 minutes for a period of 1 hour (or any number of hours inputed). I executed the script last evening and scheduled it for 2 hours but the script went on all night, for 15 hours. Any help would be appreciated.

$seconds=900/$num;   

print  "Enter the total period in hours:\n";

$periodhr=<STDIN>;
$periodsec=$periodhr*3600;


$output=1; 


for($p=0; $p<=$periodmin; $p++)

{
        for ($i=$f;$i<=$l; $i++)

          { 
            $x="$t$i";  chomp($x);

            $file="$x.bat";  chomp($file);
          

                  unless (-x $file)    #-x here checks to see if the f
+ile is executable
                  {
                     
                     warn "File $file does not appear to exist or is n
+ot executable!!\n";
                     next();
                     
                  }
 

            system("$file");
            $time=localtime;         
            print FOUT "$output \t";
            print FOUT "$file \t";           
            print FOUT "$time\n";
            $output++;
            sleep($seconds);

          }
 
    
    sleep($seconds);
    $i=$f;

}
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