$vmName = "vm01"
$vm = Get-VM -Name $vmName -ErrorAction Stop
$vm |Start-VM -ErrorAction Stop
do {
    Start-Sleep -Seconds 1
} until ($vm.Heartbeat -like "Ok*")
Write-Host "$($vm.Name) is Up."

$vmName = "vm02"
$vm = Get-VM -Name $vmName -ErrorAction Stop
$vm |Start-VM -ErrorAction Stop
do {
    Start-Sleep -Seconds 1
} until ($vm.Heartbeat -like "Ok*")
Write-Host "$($vm.Name) is Up."