Iron Scripter Cryptogram

$crypto = @"
P k T r 2 s z 2 * c F -
r a z 7 G u D 4 w 6 U #
g c t K 3 E @ B t 1 a Y
Q P i c % 7 0 5 Z v A e
W 6 j e P R f p m I ) H
y ^ L o o w C n b J d O
S i 9 M b e r # ) i e U
* f 2 Z 6 M S h 7 V u D
5 a ( h s v 8 e l 1 o W
Z O 7 l p K y J l D z $
- j I @ t T 2 3 R a i k
q = F & w B 6 c % H l y
"@

$max = 12
for ($y = 1; $y -le $max; $y++) {
    for ($x = 1; $x -le $max; $x++) {
        $string = -split $crypto
        $decrypted = $null
        $pos = $x - 1

        while ($pos -le ($string.Length - 1)) {
            foreach ($var in @($y, $x)) {
                if ($pos -ge ($string.Length)) {break}
                $decrypted += $string.GetValue($pos)
                $pos += $var
            }
        }

        [pscustomobject] @{
            'Interval' = $x, $y
            'String' = $decrypted
        }
    }
}

I must have been testing the original code in a stale environment because as soon as I tried it in a fresh Powershell session I was getting tons of errors. I was improperly looping through the interval values. I’ve updated the loop code and it works as expected now.