That's really interesting @Balgay.Hill. I've never heard of that one
Do you have an iPad? You can load a simple compass app which will show you the direction you are facing. I’m sure there must be something similar for a smart phone.Note, if I am in my house looking out of the back window at the rear garden I am looking North. If I go into the garden and look back at the house I am looking South. It is a South facing garden.