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S.P.E.C.T.R.U.M: Parabola1
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S.P.E.C.T.R.U.M: Parabola2
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S.P.E.C.T.R.U.M: circles1
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S.P.E.C.T.R.U.M: Light painting!!!!
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S.P.E.C.T.R.U.M: parabola3
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S.P.E.C.T.R.U.M: ellipse1
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S.P.E.C.T.R.U.M: Ellipse2
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S.P.E.C.T.R.U.M: Parabola4
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S.P.E.C.T.R.U.M: Parabola5
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S.P.E.C.T.R.U.M: Circles2