Although there are only seven different letters in the musical alphabet, it is possible to find higher and lower versions of them at various places on the fretboard. The distance between any note and its next higher or lower repeat is called an octave.
You already know two G notes - the open 3rd string and the third fret of the 1st string. These two G notes are an octave apart. The following example makes use of both these G notes.
A dot written after a note extends its value by half.
A dot after a half note means that you hold it for three beats.
To finish this lesson, here is an example which makes use of all the notes and note values you have learnt so far. Remember to count as you play and be sure that all your notes are clear and even. This one has been recorded faster than previous examples. Take it slowly at first and gradually work up your speed until you can play along with the recording.