Geai

turn 1 switch on for 10 mins then off4 o& X. h2 M0 |, y
turn another 1 on then go to the other house
9 z1 R% c" S3 Q: g; ?- N! `tvb now,tvbnow,bttvb
* j( o' E7 U8 \9 Q. _tvb now,tvbnow,bttvbthe hot light bulb is the first  the cold light bulb is the 3rd