Split color wavefrom 2

Warning LOUD.
Trying to split the color of the waveform preview horizontally, top and bottom having a different colors.
By using some DC offset (made with the "Even harmonics" distortion on Audacity.

First test was with a mix of two frequencies, each with a DC offset on opposing phase.
Second test was just a DC offset of one frequency (it worked, transparency on one side, colour on the other)
Third test I re-tried two frequencies, this time I added a square wave tremolo on each. Idea was the DC offset of each would apply a color to top and bottom. And the Tremolo would rapidly switch between each colour/side. Theoretically resulting in a cycle of top blue, bottom red. Then I was hoping on a long sound, it would compress the waveform so that cycling of colors would no longer be visible and just appear as one. Which it did, but not Top blue bottom red, just a mix of both resulting in a yellow ish waveform.