So... you mean that there are several centres?
If everything could go in any direction, do they ever meet something else like two points in a plane meeting at a certain point in time?
And what if they are going in opposite directions? Does one get the time the previous thing left behind?

First, may I call your attention to the guidelines for using the comments feature found here:

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Negative ratings for opinions as WG expressed are not allowed. Comments are not answers. Please use the Answer options.

Second, in the time it took to post this question the answer could have been figured out. Now you appear to be claiming that you let a friend use your account. Well that friend could have gotten you banned for violating our rules. Arguing is also a waste of time and not allowed here.