send overlord in the probe scout path
9 overlord
IF there's a scouting probe -> 9 pool and continue overpool build
IF there's no scout in the scout path, send a drone and when it gets close CANCEL the overlord and put down hatch at 9 (1:12)
9 pool (1:51)
scout immediately to check for a pylon in your expansion - if the Protoss is cannon rushing you, you need to start a colony a few seconds after his photon cannon(s)
AT 11 you need to make a decision - if you scout a forge you make only a pair of lings to start
if there's NO SCOUT before 2:30 MAKE LOTS OF LINGS because it's gate first
14 gas (2:44)
14 hatch (2:55) - you can use the scouting drone if you found your opponent with your overlord
16 overlord
here you make a decision to either hydra, speedling, or Lair
I've timed out the Lair build and you get the extra larva at Lair if you start the gas after 2:43 and you probably won't have the minerals to start it if you start your gas earlier anyway (since you need the overlord before lair)