\n\n\n";
echo "\n";
echo "\n";
echo "\n";
for ($z=$zstart; $z<=$zstop; $z++) {
echo " \n";
}
echo "
\n";
for ($z=$zstart; $z<=$zstop; $z++) {
if ($z==$zstart) {
echo "\n";
} else {
echo "
\n";
}
echo "
\n";
for ($x=1; $x<$z; $x++) {
echo "\n";
for ($y=1; $y<$z; $y++) {
if (($x+$y)%2) {
echo "| ";
echo " | ";
} else {
echo "";
echo " | ";
}
}
echo "
\n";
}
echo "
\n";
echo "
\n";
}
echo "\n