This work is by my friend, Minecrafted9193 show him some love 
Video:
You can try this project here! : A* Pathfinding Visualizer - Roblox
Instructions:
Press R to generate or remove the grid.
Press E to start the pathfinding visualization when a grid has generated.
Hold left click and drag to create obstacles on the plate.
Right click an obstacle to remove it.
Press Q to remove all obstacles.
Algorithm details:
The pathfinding algorithm used here is called A* (pronounced “a star”). If you would like to know how this algorithm works, I suggest looking up “A* Pathfinding Sebastian Lague” on YouTube. He has a good explanation.