Design a coffee beans icon with visual elements suggesting roasting levels. Render a group of 3-4 coffee beans with 3pt strokes, positioned in a horizontal or slightly diagonal arrangement. Each bean should be rendered identically with the characteristic oval shape and central seam. Add subtle visual indicators to suggest different roasting levels—such as varying internal line patterns or density marks (rendered with 3pt strokes)—to differentiate light, medium, and dark roasts. Position the beans centrally in the frame. Use pure black 3pt strokes with white background. This design educates about coffee roasting varieties, suitable for specialty coffee retailers, educational materials, or coffee sourcing contexts.

The image shows three coffee beans on a white background. The beans are sketched in detail, with each one having a distinct shape and texture. The colors used are mostly shades of brown and beige, giving the image a warm and inviting feel.