AppleScript send a SMS to a list of your contacts

SMS.applescript

tell application "Messages"
	set targetService to id of 1st service whose service type = iMessage
	
	set peopleICareAbout to {"Vincent Composieux"}
	set peopleAlreadySent to {}
	
	repeat with myBuddy in buddies
		set buddyFullname to full name of myBuddy
		set buddyFirstname to first name of myBuddy
		
		if buddyFullname is in peopleICareAbout and buddyFullname is not in peopleAlreadySent then
			copy buddyFullname to end of peopleAlreadySent
			
			send "Hi!" to buddy buddyFullname of service id targetService
		end if
	end repeat
end tell

contacts.applescript:194:201: execution error: The variable buddies is not defined. (-2753)