<fxlayout>
  <page name="Linear Gradient">
     <control>period</control>
     <control>color1</control>
     <control>color2</control>
     <rgb_link_button>color1 color2</rgb_link_button>
<separator label="Distortion Wave"/>
     <control>wave_amplitude</control>
     <control>wave_frequency</control>
     <control>wave_phase</control>
 
  </page>
 
</fxlayout>