In rock fundamemtals tutorial on scales intervals 3rds, 4ths, 5ths 6ths etc and how to improvise with them. The instructor is not clear on where he is always starting the scale in relation to the interval note. He only mentions that the interval is 5 notes away for example from where he starts but he is not always clear where he starts. When he demonstrates his improvisation with the 6ths notes for example, he is not clear on where the 6th notes are in relation to where he starts. It seems he is leaving something out. This tutorial was very confusing. The conept is understood but it was demonstrated in a very confusing manner. Can anyone help clarify?