JavaScript

As a user, I can:

• add rows to the grid
• add columns to the grid
• remove rows from the grid
• remove columns from the grid
• select a color from a dropdown menu of colors
• click on a single cell, changing its color to the currently selected color
• fill all uncolored cells with the currently selected color
• fill all cells with the currently selected color
• clear all cells/restore all cells to their original/initial color
• click and hold (mouseover) from a single cell (start) to a different cell (end) such that all affected/hovered-over cells from start to end change to the currently selected color