Lines spaced a minor third apart provide a slightly less dense appearance than lines spaced a whole step apart. Between the lines are two space-notes at different elevations. There is a repeated line-space-space pattern, three basic note positions that occur four times per octave. (Rather than a 6-6 or 7-5 pitch pattern, this could be called a 4-4-4 pitch pattern.) Three standard lines alternate with a ledger or bold line which allows for identification of the lines when stacking staves contiguously for greater pitch range.