Free Hero Mesh

COLLIDE
  Received when this object is trying to move into a location where there
  is a collision, so it can't move there. Of the return value, bit0 means
  to prevent the movement (even if the objects are moved out of the way or
  destroyed in order to make room), bit1 means to not send any COLLIDEBY
  messages, and bit2 means to pretend the move attempt was successful even
  if it isn't successful. Even if bit0 is set, that won't prevent sending
  COLLIDEBY messages unless bit1 is also set.
  COLLIDEBY messages unless bit1 is also set. Arg1 and Arg2 are the X and
  Y coordinates that it is trying to move to, and Arg3 is the collision
  bits which are conflicting.

COLLIDEBY
  Received when another object is trying to move into the location of this
  object or trying to be created in the same location as this object, if
  there is a collision in the CollisionLayers values of those two objects.
  Of the return value, bit0 means to prevent the movement, bit1 means to
  not send any more COLLIDEBY messages, bit2 means to pretend the movement
  attempt is successful even if it isn't (there is no effect for creating
  objects; this bit is meaningful only for moves), and bit4 means that if
  necessary, it will try to destroy this object to make room.
  necessary, it will try to destroy this object to make room. From is the
  object attempting to move here, and Arg1 and Arg2 are its location (if
  attempting to create an object, then From, Arg1, and Arg2 are all zero).
  Arg3 is the class of the object being moved or created.

CREATE
  Sent when the object is created by the Create instruction. This is done
  after the object is created, but before sending any other messages. The
  From is the object that created it. The return value will be used as the
  Arg3 of the SUNK and CREATED messages it might send if appropriate.
  Arg3 of the SUNK and CREATED messages it might send if appropriate. From
  is the object which executed the Create instruction to create it.

CREATED
  Sent to all objects whose Arrivals care about objects in the location
  where an object has just been created. From is the newly created object,
  Arg1 and Arg2 are the X and Y coordinates where the object was created,
  and Arg3 is the return value from the CREATE message.