php pattern code ptint letter F

<?php

for($run_code=1; $run_code<=10; $run_code++){

for($space=1; $space<=10; $space++){

echo "&nbsp";
}


if($run_code>=1 and $run_code<=2 or $run_code>=5 and $run_code<=6)

{ $lst=8; }

else
{ $lst=3; }

for($star=1; $star<=$lst; $star++){

echo "*";
}

echo "<br />";  
}
?>