Function Prompt {
    #get current year
    $year = (Get-Date).year
    #get a timespan between Christmas for this year and now
    $time = [datetime]"25 December $year" - (Get-Date)
    #turn the timespan into a string and strip off the milliseconds
    $timestring = $time.ToString().Substring(0,10)
    #get random string of decorative characters
    $front = -join (14,15,42 | Get-Random -Count 2 | Foreach { $_ -as [char] })
    $back = -join (14,15,42 | Get-Random -Count 2 | Foreach { $_ -as [char] })
    $text="[{0}Christmas in {1}{2}]" -f $front,$timestring,$back
    #get each character in the text and randomly assign each a color
    $text.tocharArray() | foreach {
    $i = Get-Random -Minimum 1 -Maximum 20
    Switch ($i) {
      {$i -le 20 -and $i -gt 15} { $color = "Red" }
      {$i -le 16 -and $i -gt 10} { $color = "Green" }
      {$i -le 10 -and $i -gt 5}  { $color = "DarkGreen" }
      default { $color = "White" }
    }
    #write each colorized character
    Write-Host $_ -nonewline -foregroundcolor $color
    } #foreach
    #the function needs to write something to the pipeline
    Write "PS $($executionContext.SessionState.Path.CurrentLocation)$('>' * ($nestedPromptLevel + 1)) "
} #end function