display chronometer connected to parrallel port

i want to make a chronometer connected to the parallel port of the computer and i want to get some help if you have done any projcet like this,i have seen something about this in a forum so i decided to do this for my lesson project.it must iclude these;TLP521-4(Optocoupler), 74LS139 (Decoder), 74LS247(Display driver), 4 anode Display.
i am trying but i dont have enough knowlegde about displays,if you have any please help.

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