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Descartes coordinate system of second grade mathematics
Move to the y axis in 2 seconds.

Move to the x axis at 6 seconds.

Move to y axis 12 seconds.

Move to x after 20 seconds.

That is to say, the time to (n, n) is n*(n+ 1), (when n is odd, it goes to the y axis, and when n is even, it goes to the x axis).

So 44*45= 1980

2009- 1980=29

44-29= 15

So the coordinate is (44, 15).