Create a subfolder in a subfolder with powershell.

Hello!

I have a script.

Add-PSSnapin microsoft.sharepoint.powershell
$libraryname = "mydoc"
$csvpath = "c:\Temp\test.csv"

# Import CSV
    [array]$FolderList = Import-Csv $CSVPath
 
    # Script Variables
    $spWeb = Get-Spweb http://sptesztlk
    $spList = $spWeb.Lists[$LibraryName]


 Foreach ($folderGroup in $FolderList)
 {
 
        # Create Parent Folder
        $parentFolder = $spList.Folders.Add("",[Microsoft.SharePoint.SPFileSystemObjectType]::Folder,$folderGroup.Root)
        $parentFolder.Update()
        Write-Host "The Parent folder" $folderGroup.Root "was successfully created" -foregroundcolor Green
 
        # Loop variables
        $i = 1
        $col = "S"
        $colID = $col + $i
 
        While ($folderGroup.$colID -ne $null)
           {
            $newSubfolder = $splist.Folders.Add($parentFolder.Folder.ServerRelativeUrl, [Microsoft.SharePoint.SPFileSystemObjectType]::Folder,$folderGroup.$colID)
            $newSubfolder.Update()
            Write-Host "The subfolder" $folderGroup.$ColID "was successfully created" -foregroundcolor Cyan
            $i++
            $colID = $col + $i
         
    $a = 1
    $asd = "D"
    $asdID = $asd + $a
        while ($folderGroup.asdID -ne $null)
        {
        $newSSubfolder = $splist.Folders.Add($newSubFolder.Folder.ServerRelativeUrl, [Microsoft.SharePoint.SPFileSystemObjectType]::Folder,$folderGroup.$asdID)
              $newSSubfolder.Update()
               Write-Host "The subfolder" $folderGroup.$asdID "was successfully created" -foregroundcolor Blue
            $a++
            $asdID = $asd + $a
        }       
    }

    
 }

    $spWeb.Dispose()

I have a problem with the sub-subfolder creation. How can i tell the program to create a 2nd level subfolder in which  subfolder?

csv file contain:
Root,S1,S2,S3
Parent1,Sub1,
Parent2,Sub1,Sub2

Creating the parent and the subfolder is ok. But i don't know to go deeper.

Or what if i don't know how many level i need for the tree creation.

I Hate Mondays