Nature's garden traffic lights

I was pondering what the heck am I studying all this stuff for when I looked into the garden and noticed the sun was shining so brightly onto the bushes - just like traffic lights - so yet again I had a good excuse to stop studying and do the much preferred daily blip instead! Though I must admit I do feel guilty now that I have taken time to download it immediately and the peruse what else is on blip - but not that guilty