**Markers** This project uses apriltag markers (from the family [`tag25h9`](https://github.com/AprilRobotics/apriltag-imgs/tree/master/tag25h9)) to detect the start and end points of the maze. Here is the meaning of each tag:
-`tag25_09_00001`, `tag25_09_00002`: are used to detect boundaries of the maze.
-`tag25_09_00003` tells the start point of the maze.
-`tag25_09_00004` tells the end point of the maze.