Dota Creep Pulling

This is a video i found about some tips on how to creep pull in Dota....


When do I have to pull?
C1:
attack the creeps approx. at xx:00 or xx:30

B2 & B4:
attack the creeps approx. at xx:15 or xx:45, when you want to pull an additional spot it depends on the creeps from spot B2/B4

C4 (during day):
about the same time as spot B2 & B4 (xx:15 or xx:45)

C4 (during night):
pull about at xx:20 or xx:50