Lacking sun

The darker part of the year is becoming dominant in here.
I lack more sun. It's even more pronounce, when I spend all the day (e.g. 7.30 - 16.00) in the school. The worst is that many of the more interesting subjects are in the afternoon...
But this way, I'm coming to school before the sun rises and leaving when the sun sets.
I'm quite sensitive to this "darkness lifestyle..." My mood is worsening rapidly. I have to do something. One thing is drinking more and more tea (nowadays I'm drinking some 2 liters of tea per day, which by the way is, in the means of caffeine, equivalent to one or two cups of coffee). Another "good thing" seems to be going to school on skates. Ann (and others as well) asked me a few times, why I don't go to school on skates, when I go on it on much longer distances. So I tried it (twice, so far). It's really refreshing for me. Surprising, yet true (maybe endorphin flooding my blood?). When I'm the worst off, I go counting Math or Physics or doing a maturita topic. This calms me. Pervert, aren't I?