Every New Design picks a different mix of doodles, layout, rotation and style, and never repeats one you already made this session. Pick any two colors (or tap Random 2 Colors): only those two colors are used (a gradient between them is off unless you tick Use gradient) on a white background. All strokes are exported as filled outline shapes. Designs are seamless repeat tiles; the preview always shows one single tile, and Repeat Preview 3×3 shows it repeated if you want to check the joins.
SVG is exported as filled outlines (no strokes), black background, white shapes.