i edited BronzeWing's code and made it faster so it still has a cool update effect(as long as line 72 is not commeted). it's faster than Aristotle's code when line 72 is commeted out and almost as fast when its not commeted out

#!/usr/bin/perl -w

use strict;
use Tk;

############
# Settings #
############
my $Epsilon = 8;
my @Lines = ([200, 300, 600, 300]);
my @Points = map $_/90, (
#my design best with 90 for @Points
    (-20,20),
    (20,10),
    (90,-10),
    (120,20),

#original design best with 96 for @Points
    #(  0,   0),
    #( 10,  20),
    #( 90, -20),
    #(100,   0),
);

#you can put your own colors here
sub randomc {
    my $i = rand(2);
    if ($i>=0 && $i<1) {return '#b10000';}
    if ($i>=1 && $i<2) {return '#b15128';}
}

###########
# Widgets #
###########
my $Main = new Tk::MainWindow;
$Main->Label('-textvariable'=>\(my $Status="Initializing..."))->pack;
my $Canvas = $Main->Canvas(
    '-width'=>900,
    '-height'=>700,
    '-background'=>'#000000'
)->pack;
my @LineItems = @Lines;

#############
# Main Loop #
#############
$Main->update;
while (++our $i<10) { # change 10 if u need more
    $Status = "Iteration $i...";
    for (my $Line=0;$Line<=@Lines-1;$Line++) {
        my @Line = @{$Lines[$Line]};
        if (abs($Line[2]-$Line[0])>$Epsilon or abs($Line[3]-$Line[1])>
+$Epsilon) {
            my @NewLines;
            my @NewItems;
            for (my $Point=0;$Point<$#Points-1;$Point+=2) {
                my ($X1, $Y1, $X2, $Y2) = @Line;
                push @NewLines, my $NewLine = [
                    $Line[0]+($Line[2]-$Line[0])*$Points[$Point+0] +
                        ($Line[3]-$Line[1])*$Points[$Point+1],
                    $Line[1]+($Line[3]-$Line[1])*$Points[$Point+0] -
                        ($Line[2]-$Line[0])*$Points[$Point+1],
                    $Line[0]+($Line[2]-$Line[0])*$Points[$Point+2] +
                        ($Line[3]-$Line[1])*$Points[$Point+3],
                    $Line[1]+($Line[3]-$Line[1])*$Points[$Point+2] -
                        ($Line[2]-$Line[0])*$Points[$Point+3]
                ];
                push @NewItems, $Canvas->createLine(@$NewLine, '-fill'
+ => randomc());
            }
            splice(@Lines,$Line,1,@NewLines);
        #$Line += $#NewLines;#good for some fractals not for others wi
+thout commet you need more iterations and update effect isnt as good
        }
        $Main->Exists ? $Main->update : exit; #with this line commeted
+ out its like Aristotle's Code
    }
    $Main->Exists ? $Main->update : exit;
    last unless 2;
}

$Status = "Done.";
MainLoop;
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