Send play and stop commands when ATEM switches to/from an input

MonitorForPlayback.ps1

$monitor=3 #ATEM input to trigger play and stop
function ConnectToATEM()
{
    Try{
        $ATEMipAddress = (Get-ItemProperty -path 'HKCU:\Software\Blackmagic Design\ATEM Software Control').ipAddress
        $DocumentsPath = [Environment]::GetFolderPath("MyDocuments") + '\windowspowershell\SwitcherLib.dll'
        add-type -path $DocumentsPath
        
        $Global:atem = New-Object SwitcherLib.Switcher($ATEMipAddress)
        $atem.Connect()
        }
        catch{
        write-host "Can't connect to ATEM on $($ATEMipAddrss)."
        Write-Host "ATEM controle software must be installed and have connected to switcher at least one time"
        exit
        }
}
ConnectToATEM
$me=$atem.GetMEs()
$Global:me1=$me[0]
$Global:Program = $me1.program
do{
    [Int32]$CurrentProgram = $Global:me1.Program # | get-member
    if($Global:Program -ne $CurrentProgram){
        
            if($CurrentProgram -eq $monitor){
                #Play
                write-host "Play"
            }
            elseif($Global:Program -eq $monitor){
                #Stop
                write-host "Stop"
            }
        

        $Global:Program = $CurrentProgram
        
    }
    start-sleep -Milliseconds 10

}while($true)