http://www.perlmonks.org?node_id=280182

After reading Perl Idioms Explained - $|++, I ended up with this. (Works on DOS at least, plus random errors once a while.)
$|=1;$"="\r";for(1..20){print(chr(0b100000)x rand(40),"Perl@{['','']}" +);print("@{[chr(0x1f+sleep(1))]}"x80,chr(0b1101))}