accepting people until group has 666 members

1. Go to your steam friend list (you have to use your browser)

2. Right click it and press inspect or just F12 (console shortcut is CTRL+SHIFT+i)

3. Go to console tab

4. Paste this code and press enter!
var groupID = '103582791465813658';
var friends = GetCheckedAccounts('#search_results>.selectable');

InviteUserToGroup(null, groupID, friends);

5. If it says "Invitations Sent!" it worked