i know!
3 V2 l3 @, G* V; qwhen they can have 15 mins discussion.
4 d8 w: w% d* O& O( Q" W+ G: ]make 1 of them to do a specific job whcih is counting
7 L0 L2 z% J/ R9 W Zonly him can turn on off off the light.
. T$ |7 ?# Z3 R8 X1 x: YBasically, if you are the first time to get in the room, turn on the light, tvb now,tvbnow,bttvb( Y2 |8 |& J C6 a$ |6 b' ~" X
then wait for "the special man" to turn the light off....
( P& ]+ x& J: Q& Ztvb now,tvbnow,bttvbwhen "the special man" count in up to 30 (included himself)
" _. V9 X! ]* Z: o3 S% L6 zthen it is done! |