The Copic colour library is translated using hex colour codes whereby swatches are grouped as arrays that get displayed to screen according to an imported greyscale contour map created in another Processing sketch seen here.
Depending on the contour shade a swatch array is assigned and randomly plotted as an ellipse within the specified area only.
The above image shows how the image builds over time making it possible to prototype images for further exploration and development.
Each frame can be saved as a static image independently at any time or can be automated to save an image according to a specified frame number. If the script is left to run for hours the coloured points slowly build to form a solid speckled mesh.