blackboard verbs

READ BLACKBOARD Display all messages on blackboard
     
WRITE BLACKBOARD; {message} Used to add a message to the blackboard.
     
NUDGE BLACKBOARD Used to rotate through the messages to the one you wish to erase.
     
RUB BLACKBOARD Used to erase a message from the blackboard.
     
SCRATCH BLACKBOARD Used to change sequence of messages on the blackboard.
     
LOOK BLACKBOARD Provides help.