Creating new playlist via Applescript

I am very new to Applescript and I am trying to create a temp Playlist but have met some errors. Can anyone help?

This is my script

tell application "iTunes"

my create_tempPlaylist("Temp1")

my create_tempPlaylist("Temp2")

display dialog "Voila!" buttons {"Thanks"} default button 1 with icon 1

end tell

on create_tempPlaylist(NameOfTempPlaylist)

if user playlist name:NameOfTempPlaylist exists then

try

--delete tracks of user playlist albumPlaylistName

end try

else

make new playlist with properties {name:NameOfTempPlaylist}

end if

end create_tempPlaylist