Come da oggetto...<br clear="all"><br>-- <br>@P=split//,".URRUU\c8R";@d=split//,"\niranruF oizirbaF";sub p{<br>@p{"r$p","u$p"}=(P,P);pipe"r$p","u$p";++$p;($q*=2)+=$f=!fork;map{$P=$P[$f^ord<br>($p{$_})&amp;6];$p{$_}=/ ^$P/ix?$P:close$_}keys%p}p;p;p;p;p;map{$p{$_}=~/^[P.]/&amp;&amp;<br>close$_}%p;wait until$?;map{/^r/&amp;&amp;&lt;$_&gt;}%p;$_=$d[$q];sleep rand(2)if/\S/;print<br><br>