it all depends on how long it takes to run through the task loop. it should hopefully complete the loop issuing task to every unit then move on to the next part of your program. Afterall your not doing any animation during the caluation phase. If you move a unit it the task loop should update the units current postion. When the task loop is done your draw method will simply draw the unit in its new position.

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Writer, Programer, Cook, I''m a Jack of all Trades
Current Design project
Chaos Factor Design Document