<?php
while (true)
{
for ($i = 0; $i < 10; $i++)
{
for ($z = 10; $z >  $i; $z--)
{
echo " ";
}

echo "hello";
echo "\n";

}

for ($i = 0; $i < 10; $i++)
{
for ($z = 0; $z <  $i; $z++)
{
echo " ";
}

echo "hello";
echo "\n";

}

}

?>