Nature's litmus paper

Studying again today - boooo
I really, really, really can't be bothered but only 4 days to go and then it's over - yippee. Not that is going to make any difference at all - no extra work, no extra money - nowt.
So why am I doing it? I dunno!

Anyway, I found another distraction courtesy of blip.
The sky was a variety of colours this afternoon as the sun went down, so I tried to get a "good blip" - all were rubbish - all 40 of them - so I cropped the part of the photo I liked and hence the paper strip