Generate a clean, minimalist wide banner image (1200x400px, 3:1 aspect ratio) for a GitHub README. White or very light background. In the center, display the text "COGILES" in a bold, modern sans-serif font (like Inter or Montserrat). Below or beside the title, include a small subtitle: "Colored Graph Input Line Entry System". To the left and right of the text, place a simple flat-style graph diagram with circular nodes connected by thin lines/edges. The nodes should use these specific solid colors: red, green, blue, yellow, cyan, magenta, and orange. Keep the nodes evenly spaced and geometrically pleasing. No gradients, no shadows, no 3D effects — pure flat design. The overall feel should be technical, clean, and developer-friendly. No decorative borders or unnecessary elements.
