rythm.addRythm('color1', 'color', 0, 10)
rythm.addRythm('color2', 'color', 0, 10, {
from: [0,0,255],
to:[255,0,255]
})
rythm.addRythm('color3', 'color', 0, 10, {
from: [255,255,0],
to:[255,0,0]
})