Drawing Maze Walls

[kpack18]

As Mathew Hertz, I would like to draw in the grid so I can create a maze to run an algorithm on.

[kpack18]

Acceptance Test:

1.) Click on a tile in the grid to see it turn black, you just placed a wall 2.) Click on an uncolored tile and drag in a line to draw in multiple Tiles 3.) Continue drawing whatever maze you like until all the tiles are colored black

[kpack18]

Tasks:

1.) Implement Button listener to change color to black when clicked 2.) Implement dragging functionality 3.) Update to change colors