who is invisible on yahoo

To find who is invisible on yahoo messenger just do the simple steps written below :

1.sign inside yahoo messenger
2.double click on the person whom u want to see is invisible or not (from ur messenger list)
3.Then click on IMenvironment --> see all environments --> Interactive Fun --> Doodle.
Note: If the user is really offline in a white screen it will be written waiting for ur buddy to load Doodle
but if he is online and he has made his status invisible- instead of the message (waiting for ur buddy to load doodle) there will be only a blank screen.

reply hw is it?