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Once I had seen a nice tutorial here, in comments, but now it seems to be missing. Could someone tell me a strategy to cope with bonnie and chica?. Okay, so, for example, whenever I hear steps, I immediately check the door and then close it. But how do I know whether it is time to open the door?

I am sorry, but could anyone tell me how do I know when to open the door? For how long does foxy wait to move?