Dear All,
It is a memory game, I have almost completed my script. However I cannot understand, How to make Tk sleep (Please check '############# This DOES NOT WORK AS EXPECTED ' in my code)?? Here when I click on 2nd button, I want image to appear atleast for 2 secs and then disappear. However the image is disappearing when you click 2nd button. Forgive me if my explaination is Not proper.

use strict;
use Tk;
use Tk::Button;
use Tk::Canvas;
use Tk::Photo;
use Tk::Splashscreen;
require Tk::Splash;
#####################
my @filearray;

opendir( DIR, 'images' ) or die "Can't open images DIR $!";
while ( my $entry = readdir( DIR ) ) {
        my $type = ( -d "images\\$entry" ) ? "dir" : "file"; 
        push @filearray, "images\\$entry" if (($type eq "file") && ($e
+ntry =~ /\.gif$/));
        #print "$type\t$entry\t@filearray\n";
    }
closedir( DIR );
@filearray = (@filearray,@filearray);
####################
#fisher_yates_shuffle(\@filearray);
unshift @filearray, "NIL";

#foreach (@filearray) {print $_,"\n";};
my @arranged_gifs;

my $top = new MainWindow;
my $loop_cntr=0;
my $state_of_button=-1;
my $prev_x = undef;
my $prev_y = undef; 
my $number_of_clicks=0;
my $prev_clicked_button=undef;
foreach my $x (1..10)
{

    for my $y (1..5)
    {
        $loop_cntr++;
        $arranged_gifs[$x][$y]= $filearray[$loop_cntr];
        #print "$loop_cntr:$x:$y:-".$arranged_gifs[$x][$y]."\t".$filea
+rray[$loop_cntr]."\n";
        my $button = $top->Button(-width => 10, -height =>3,-command=>
+sub{click_button($x,$y,\$top->gridSlaves(-row=>$x,-column=>$y), \$pre
+v_clicked_button)});
        $button->configure(-text=>'Hey');
        $button->grid(-row =>$x , -column =>$y);
    }
}


sub click_button($$$){
    my ($myx,$myy,$clicked_button,$prev_clicked_button)=@_;
    $number_of_clicks++;
    my $mywait;
    my $image = $top->Photo(-format => 'gif' , -file=>$arranged_gifs[$
+myx][$myy]);
    ${$clicked_button}->configure(-width => 50, -height =>30, -image=>
+$image, -state=>'disabled');
    if ($number_of_clicks == 1)
    {
        print "Hello\n";
        ${$prev_clicked_button} = ${$clicked_button};
    }
    if ($number_of_clicks == 2)
    {
        print "pair\n";
############# This DOES NOT WORK AS EXPECTED 
        sleep(2);
#####################################
        $number_of_clicks=0;
        
        ${$prev_clicked_button}->configure(-width => 10, -height =>3, 
+-state=>'normal', -image=>undef);
        ${$clicked_button}->configure(-width => 10, -height =>3, -stat
+e=>'normal', -image=>undef);

    }
    

}


sub fisher_yates_shuffle {
    my $array = shift;
    my $i;
    for ($i = @$array; --$i; ) {
        my $j = int rand ($i+1);
        next if $i == $j;
        @$array[$i,$j] = @$array[$j,$i];
    }
}

MainLoop;
[download]

Thanks,
SanPerl