the canvas element and getting its rendering context (ctx).
Grid Initialization:

The rows and cols variables define the dimensions of the grid (40x40 cells), and cellSize calculates the size of each cell on the canvas.

grid is a 2D array that represents the grid. It starts as an empty grid filled with false values, where false represents a dead cell.

Event Listeners:

The code sets up event listeners:
canvas listens for clicks to handle cell toggling when the simulation is not running.
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