i have a simple gui perl/Tk code. It prints time, date and user-id. Is it possible to configure date variable so that my wnidow keeps updated with time change without any button click

#!/usr/bin/perl
use Tk;

$ashu="tan";                                    #color for main window
$screen_resolution="800x400+200+100";           #size of main window
$mw = new MainWindow(-background=>$ashu);
$mw -> geometry($screen_resolution);
$mw -> title("VENTURA");
$mw -> Label(-text=>"ventura disk space utilization tracker",-foregrou
+nd=>"red",-background=>$ashu,-font=>"{Times New Roman} 20 normal roma
+n") -> pack();
$user_id = `whoami`;
$date = `date +%d%B%Y`;
$time = `date +%T`;

#---------------------------------------------------------------------
+----------
$INFO = $mw->Frame(-background=>$ashu)->pack(-side=>'top',-fill=>'both
+', -pady=>10);
$INFO->Button(-text => "$user_id",-width=>16,-height=>2,-relief=>"flat
+",-foreground=>"white",-background=>$ashu,-font=>"{Times New Roman} 1
+0 normal roman")->grid(-row=>0,-column=>0,-padx=>45);
$but_date = $INFO->Button(-textvariable => \$date,-command=>\$update_d
+ate,-width=>16,-height=>2,-relief=>"flat",-foreground=>"white",-backg
+round=>$ashu,-font=>"{Times New Roman} 10 normal roman")->grid(-row=>
+0,-column=>1,-padx=>45);
$but_time = $INFO->Button(-textvariable => \$time,-command=>\$update_t
+ime,-width=>16,-height=>2,-relief=>"flat",-foreground=>"white",-backg
+round=>$ashu,-font=>"{Times New Roman} 10 normal roman")->grid(-row=>
+0,-column=>2,-padx=>45);
#---------------------------------------------------------------------
+----------

MainLoop;
[download]