April Fool's silliness
Below is some code that formats tables -- shades alternate rows -- used in an intranet application internally...
yeah, yeah, yeah, I know the code is ugly, but it works, and I didn't know much perl when I wrote it... so please be gentle on this old code!....
Anyway, on April Fools, I set  $silly to true using  rand about 1 in 10 times.... truly horrible.

nop

sub table {
    my $html = shift;
    my $i=1;
    $html =~ s{<\s*(t\w+)}{
    if (lc($1) eq "tr") {$i++; "<tr";} 
    elsif (lc($1) eq "td") {
        (($i%2) == 1) ? '<td bgcolor="#F4FAFF" align="center"' : 
                '<td bgcolor="#E1f1FF" align="center"';}
    elsif (lc($1) eq "th") {
        (($i%2) == 1) ? '<th bgcolor="#F4FAFF" align="center"' : 
                '<th bgcolor="#E1f1FF" align="center"';}
    else {"<$1"}
    }iegm;
    if (!$silly) {return $html;}
    my $dir;
    $html =~ s{<td.*?>(.*?)<\/td>}{
    $dir = (qw(left right up down))[rand()*4];
    if (rand()<.2) {
        "<td><marquee direction=\"$dir\" behavior=\"alternate\" height
+=\"40\"  vspace=\"2\">$1</marquee></td>";
    } else {
        "<td>$1</td>";
    }
    }ieg;
    return $html;
}
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