VM's Shutdown, take Snapshot, power on, delete snapshot

Hi

I did get the below mentioned script created by LucD in one of the answers to a community

$VM = (Get-Content c:\temp\servers.txt)

foreach($vm in Get-VM -Name $VM){

    Shutdown-VMguest -VM $vm -confirm:$false

    while ($vm.ExtensionData.Runtime.PowerState -eq "poweredOn"){

        Start-Sleep -Seconds 2

        $vm.ExtensionData.UpdateViewData("Runtime.PowerState")

    }

    New-Snapshot -VM $vm -name (get-date)

    Start-VM -VM $vm

}

That helps me to start, though what my requirement is :-

Shutdown a VM

Check for ping status

Once down, take snapshot with the name as of that date & time, send a confirmation e-mail, say on Monday

Power on the machine. send a confirmation e-mail.

Same script will be scheduled to run after 2 day to have another snapshot on the same machine, say on Wed.

Now on Fri,  I need to take another snapshot of the name with that days date & time, once done

Delete the snapshot that was taken on Monday.

Power on the machine.

And it goes on ...as again on Mon, new snapshot after powering down & deleting the oldest snapshot i.e. taken on Wed. & then power it on send a confirmation e-mail.