This generative artwork features an array of brush strokes on a textured paper background, creating an abstract and visually appealing piece. The artwork is created using a combination of randomness and pre-defined elements, resulting in a unique composition each time the algorithm runs.

Key features of the artwork and their calculations:

Paper Background: The paper background is created using a semi-transparent color from a pre-defined set of five colors, randomly selected for each iteration. This background also includes a noise overlay to simulate texture, with random grayscale values for each pixel.

Color Palettes: The artwork utilizes pre-defined color palettes, each with its unique set of colors and an accent color. A palette is randomly chosen for each iteration.

Accent Presence: The artwork may or may not feature an accent color from the chosen palette, depending on a random roll. There's a 20% chance that the accent color will be used in the composition.

Brush Strokes: The artwork is composed of a varying number of brush strokes, determined by a custom probability distribution function that favors lower numbers. The number of strokes can range from 250 to 500, with higher numbers being rarer.

Stroke Generation: The brush strokes are generated in multiple passes. The number of passes varies randomly between 3 and 7. The strokes are evenly distributed among the passes, with each pass using a random color from the chosen palette. If an accent color is present, it will be used in the final pass.

Brush Stroke Properties: Each brush stroke has randomized properties, including size (width of individual lines), length, angle (in radians), number of parallel strokes, and spacing between parallel strokes. These randomizations contribute to the abstract and dynamic appearance of the artwork.

Canvas and Margins: The final artwork is displayed on a square canvas, with the generated composition centered and surrounded by margins. The canvas size is determined based on the window size, maintaining a 1:1 aspect ratio.