So simple and obvious as soon as you see it in action. I love "hacks" like this: really easy to code, but with a big impact - and so many potential uses too! I'

So simple and obvious as soon as you see it in action. I love "hacks" like this: really easy to code, but with a big impact - and so many potential uses too! I'm adding "scent trails" to my bag of tricks for sure.