Autumn

It is a beautiful time of year. The trees start changing colors and like an artist paint the landscape with Oranges, Yellows, Reds and even Purples plus we can't forget the Brown, I know not as pretty but still part of the fantastic Fall foliage.
As the days get shorter the trees realize Winter is coming so they start going into a dorment phase. This lack of activity cause some chemicals to get trapped in the leaves and this turns Red & Purple. Too much of another chemical is what brings about the Oranges and Yellows. Now Brown that is just waste left in the leaves.
That's right all these beautiful colors we look forward to are just natures way of dealing with the next season, Winter.