ActivityIndicator.ps1

function ScrollOnPromptUntil($UntilDateTime, $prePromptMsg, $postPromptMsg, $postPromptMsgOnNextLine) 
{
    $scroll = "/-\|/-\|"
    $idx = 0
    
    Write-Host $prePromptMsg -NoNewline   
    $origpos = $host.UI.RawUI.CursorPosition
    do
    {
        $host.UI.RawUI.CursorPosition = $origpos
        Write-Host $scroll[$idx] -NoNewline
        $idx++
        if ($idx -ge $scroll.Length)
        {
            $idx = 0
        }
        Start-Sleep -Milliseconds 100
    } until ((Get-Date) -ge (Get-Date $UntilDateTime))

    Write-Host "`b$postPromptMsg`r" -NoNewline

    # It's over - clear the activity indicator.
    $origpos.X = 0
    if ($postPromptMsgOnNextLine -eq $true) { 
        $origpos.Y += 1
    }
    $host.UI.RawUI.CursorPosition = $origpos
}