Mk131 traffic signal circuit difficulties?

hi i have doubts regarding mk131 traffic signal ? ,they have given circuit diagram in the manual .i know how the counter works but if somebody can explain as to how the transistors and resistor works then t will be helpful .please answer it as fast as possible.my email address is sgsjpuc@gmail.com ,email the ans to this address ?

Sorry, no circuit descriptions.
Maybe a user on the forum ?