Music is written on a Staff, which consists of 5 parallel lines and 4 spaces. Bar Lines are drawn across the staff, which divide the music into different sections called Bars or Measures. The end of the music is indicated by a Double Bar Line, and two dots placed before a double bar line indicate a Repeat Sign. A Bass Clef is placed at the beginning of the staff.
This clef indicates the position of the note F which is on the line in between the two dots.