Create a visually appealing background image with a black and sky blue gradient effect. The gradient should transition smoothly, blending from black to sky blue. This image should be professional and visually engaging, suitable for a software developer's profile. Include subtle, abstract elements related to coding or software development, such as faint lines of code, circuit patterns, or digital motifs, to enhance the theme without overwhelming the design. On the center right side, add a circular element resembling a black hole effect, with a subtle glow or halo around it to draw attention. The overall style should be modern and sleek, balancing professionalism with creativity.