Powershell Pomodoro Timer, locks the workstation when timer expires

pomodoro.ps1

# SPDX-License-Identifier: Unlicense
if ($args.count -eq 0)
{
    write-host "Pomodoro Timer that locks the workstation (screen) when done."
    write-host "Usage: pomodoro.ps1 <minutes> ['activity']"
    write-host "Example: pomodoro.ps1 5 try out new script"
    Exit
}

# Select default activity if none is specified, otherwise concat all optional arguments
$Activity = ($args[1] && $args[2..22]) ?? "Pomodoro"
$Activity = $Activity -join " "

# Start and update the timer until the specified duration is reached
$Start = Get-Date
$Duration = New-TimeSpan -Minutes $args[0]
$End = $Start + $Duration
Do{
    Start-Sleep -Seconds 1
    $DisplayTime = New-TimeSpan -Start $(Get-Date) -End $End
    $Time = "{0:D2}:{1:D2}" -f ($DisplayTime.Minutes),  ($DisplayTime.Seconds)
    Write-Progress $Time -Activity $Activity
}
While((Get-date) -lt $End)

# Lock the Screen
rundll32.exe user32.dll,LockWorkStation