ConfigureDSCClient.ps1

configuration ConfigureDSCClient
{
    param ($NodeId, $PullServer)    

    LocalConfigurationManager
    {
        AllowModuleOverwrite = 'True'
        ConfigurationID = $NodeId
        ConfigurationModeFrequencyMins = 60 
        ConfigurationMode = 'ApplyAndAutoCorrect'
        RebootNodeIfNeeded = 'True'
        RefreshMode = 'PULL' 
        DownloadManagerName = 'WebDownloadManager'
        DownloadManagerCustomData = (@{ServerUrl = "https://$PullServer/psdscpullserver.svc"})
    }
}

ContosoWebsite.ps1

#ContosoWebsite.ps1

Configuration ContosoWebsite
{
  param ($MachineName)
  Node $MachineName
  {
    #Install the IIS Role
    WindowsFeature IIS
    {
      Ensure = "Present"
      Name = "Web-Server"
    }

    #Install ASP.NET 4.5
    WindowsFeature ASP
    {
      Ensure = "Present"
      Name = "Web-Asp-Net45"
    }
  }
}

#ContosoWebsite –MachineName "server2.contoso.com"

NewPullServer.ps1

#NewPullServer.ps1

configuration NewPullServer
{
  param
  (
    [string[]]$ComputerName = 'localhost'
  )

  Import-DSCResource -ModuleName xPSDesiredStateConfiguration

  Node $ComputerName
  {
    WindowsFeature DSCServiceFeature
    {
      Ensure = "Present"
      Name   = "DSC-Service"
    }

    xDscWebService PSDSCPullServer
    {
      Ensure                  = "Present"
      EndpointName            = "PSDSCPullServer"
      Port                    = 8080
      PhysicalPath            = "$env:SystemDrive\inetpub\wwwroot\PSDSCPullServer"
      CertificateThumbPrint   = "AllowUnencryptedTraffic"
      ModulePath              = "$env:PROGRAMFILES\WindowsPowerShell\DscService\Modules"
      ConfigurationPath       = "$env:PROGRAMFILES\WindowsPowerShell\DscService\Configuration"
      State                   = "Started"
      DependsOn               = "[WindowsFeature]DSCServiceFeature"
    }

    xDscWebService PSDSCComplianceServer
    {
      Ensure                  = "Present"
      EndpointName            = "PSDSCComplianceServer"
      Port                    = 9080
      PhysicalPath            = "$env:SystemDrive\inetpub\wwwroot\PSDSCComplianceServer"
      CertificateThumbPrint   = "AllowUnencryptedTraffic"
      State                   = "Started"
      IsComplianceServer      = $true
      DependsOn               = ("[WindowsFeature]DSCServiceFeature","[xDSCWebService]PSDSCPullServer")
    }
  }
}

#This line actually calls the function above to create the MOF file.

#NewPullServer –ComputerName server1.contoso.com

Found here: http://www.systemcentercentral.com/day-1-intro-to-powershell-dsc-and-configuring-your-first-pull-server/