Ok this is a pretty good guestbook which is extremely simple you can write, read, and type !guestbook for help

This is how it works :D

Type !guestbook and it'll tell you, using my timer from scratch :D which luckily worked ;p , to type

!addgb {yourtexthere}
To add a guestbook message and
!readgb
To read a random guestbook message!

It's as simple as that so again the commands are
!guestbook
Get instructions
!addgb {yourtexthere}
Add a guestbook entry
!readgb
Read a random entry!

on *:text:!guestbook:#: {
  .timer 1 1 notice $nick 12Guestbook-4Type 12!Addgb (yourtexthere)4 to write a message in the guestbook!
  .timer 1 2 notice $nick 4Type 12!Readgb4 to read a random message!
  .timer 1 3 notice $nick 4For help type 12/msg $me
}

on *:text:!addgb*:#: {
  write guestbook.txt $2- < Added by $nick > === Random guestbook message
}

on *:text:!readgb*:#: {
  msg $chan $read(guestbook.txt) 
}