code: func (g *Driver) SetLED(led Led, red, green, blue uint8) error {
  	return g.writeBytes([]byte{
  		goPiGo3Address,
  		SET_LED,
  		byte(led),
  		byte(red),
  		byte(green),
  		byte(blue),
  	})
  }
docs: // SetLED sets rgb values from 0 to 255.