Function Get-RotatingStarChar
{
    Param(
        [Parameter(Mandatory=$true,Position=0)]
        [AllowEmptyString()]
        [ref]$StarHolder
    )
    $local:line = '◐◓◑◒'
    if ([String]::IsNullOrEmpty($StarHolder.Value) -or ($local:line[-1] -eq $StarHolder.Value))
    {
        $StarHolder.Value = $local:line[0]
    }
    else
    {
        $StarHolder.Value = $local:line[ $local:line.IndexOf($StarHolder.Value) + 1]
    }
    return $StarHolder.Value
}

#region Rotate star
$sh = $null
foreach ($i in @(0..100))
{
    Write-Progress -Activity 'Star' -Id 1 -Status "     $(Get-RotatingStarChar ([ref]$sh))     "
    Start-Sleep -Milliseconds 100
}

foreach ($i in @(0..100))
{
    Write-Progress -Activity 'Star' -Id 1 -Status "     $('abcd'[$i % 4])     "
    Start-Sleep -Milliseconds 250
}