Click on a wall or weight node to enter "eraser mode" and then drag over wall and weight nodes to remove them
Click on a blank node to either enter "wall mode" or "weight node", drag over blank nodes to occupy them
Switch between selecting "wall mode" and "weight mode" by clicking the right most button to toggle between them
Weight nodes have a weight of 5 while blank nodes have a weight of 1
You can move both the start and end nodes by dragging them
To start the pathfinding animation, select an algorithm from the top left drop down box and click the bottom left button

Thanks for visiting and hope you have fun with the pathfinder!