Make the black lines of a gabor thinner than the white lines in psychtoolbox

I'm creating an array of gabors for a visual stimulus, but am having trouble making the black lines thinner than the white lines. I am using the CreateProceduralGabor function from psychtoolbox for this. Any tips would be greatly appreciated!

[Katcha]

Here's the code I'm working with at the moment (minus the array aspect): https://peterscarfe.com/driftingGabor.html

Answer 1

[Constantino Carlos Reyes-Aldasoro]

Very hard to help with questions like this. Please try to include your code, sample data and what you have already tried.

[Katcha]

Sorry about that! I've included the code I've been basing my own off of.