Powershell script modify webpart on page Sharepoint 2010

$site = new-object Microsoft.SharePoint.SPSite("http://yoursite.com")
$web = $site.OpenWeb("RandomSite/AnotherSite/")
$page = $web.GetFile("Pages/default.aspx")
$page.CheckOut()
$wpm = $web.GetLimitedWebPartManager("Pages/default.aspx", [System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)
$wpm.WebParts | ft

$wp = $wpm.WebParts[1]
$wp.EnableRedirect = $false
$wp.Url = "http://www.google.com/"
$wpm.SaveChanges($wp)
$page.CheckIn("Test")
$page.Publish("Test")
$web.Close()
$site.Close()