Staff: A standard music staff will be used to show you which chords have to be played a how long a certain chord must be played for. The music staff consists of five lines with a treble clef at the beginning of the staff.
Bars: The staff is divided into sections called bars or measures. The bars are separated by a vertical line called a bar line with a double bar line to mark the end of a progression. There are four "beats" or four "counts" to every bar as indicated by the time signature at the beginning of the staff. At this stage you will strum one down-strum on every beat of the bar. Example Two shows an A Major chord being strummed for four bars.