Navigate from the green start cell to the red end cell, visiting the yellow numbered cells in ascending order (1, 2, 3, ...). Use only horizontal and vertical movements (no diagonal). Find the shortest path between consecutive targets. Only modify what the task requires; keep the background and any other element unchanged. Output one image each time the agent reaches the next numbered cell, plus a final image when the agent arrives at the red end cell, each with the path segment from the previous position drawn as a cyan line.