Another important aspect of rhythm are accents: a way of playing some notes louder, to make them stand out. The music symbol is an arrow.

These exercises use power chords and palm muting.

1) Eighth notes (2 notes per click)

2) Triplets (3 notes per click)

3) Sixteenth notes (4 notes per click)

4) Combinations using different accents 

Now here's ties.

1) Eighth notes

2) Triplets

3) Sixteenth notes (see eighth notes exercises).

Now some examples using rests, accents and different rhythm groups:

These are just ideas: it is important that you learn to use together every rhythmic element seen separately in the last lessons.