Added harmonic scheme

![screen shot 2014-10-21 at 21 17 23](https://cloud.githubusercontent.com/assets/6362150/4725493/0eaacb1e-595a-11e4-9046-a1812f36f0fa.png)
![screen shot 2014-10-21 at 21 17 15](https://cloud.githubusercontent.com/assets/6362150/4725492/0ea77036-595a-11e4-814a-69215c677d4f.png)