A Magic Eye / SIRDS-style autostereogram. The entire image is filled edge-to-edge with a dense, seamless, uniformly distributed repeating micro-pattern of tiny colorful cartoon dogs, paw prints, bones, and dog collars — all elements must be small, equal in size, and spread with completely uniform density across the whole image. There must be NO visible silhouette, NO dark outline, NO shadow, NO tonal overlay, NO burned-in shape of any dog or bicycle anywhere in the visible image. The pattern must look 100% uniform — no region should be darker, lighter, or different in any way. The hidden 3D object (a dog riding a bicycle) is encoded ONLY through subtle horizontal pixel-shift variations in the repeating pattern, invisible to the naked eye, and only perceivable when the viewer diverges or relaxes their eyes. The background is black. The style is exactly like a 1990s Magic Eye book page. Do not draw any dog or bicycle as a visible element. Do not composite or overlay any shape on top of the pattern.