class World {

  // Constructor for the World class

  constructor(gridI, gridJ, cellSize) {

    this.cellSize = cellSize; // Size of each cell

    this.grid = []; // 2D array to store cells

​

    // Create a grid of cells

    for (let j = 0; j < gridJ; j++) { // Iterate over rows

      let row = [];

      for (let i = 0; i < gridI; i++) { // Iterate over columns

        let cell = new Cell(i, j, this.cellSize); // Create a new cell

        row.push(cell); // Add the cell to the row

      }

      this.grid.push(row); // Add the row to the grid

    }

  }

​

  // Function to display all cells in the grid

  show() {

    strokeWeight(1); // Set the stroke weight

    stroke("#f0f0f0"); // Set the stroke color

    this.grid.forEach((row) => {

      row.forEach((cell) => {

        cell.show(); // Call the show function of each cell

      });

    });

  }

​

  // Function to update the state of all cells for the next generation

  overWrite() {

    this.grid.forEach((row) => {

      row.forEach((cell) => {

        cell.overWrite(); // Call the overWrite function of each cell

      });

    });

  }

​

  // Function to find and assign neighbors to each cell in the grid

  findNeighbours() {

    for (let j = 0; j < this.grid.length; j++) { // Iterate over rows

      let row = this.grid[j];

      for (let i = 0; i < row.length; i++) { // Iterate over columns

        let cell = row[i]; // Get the current cell

        // Iterate over neighboring cells

        for (let dj = -1; dj <= 1; dj++) {

          if (this.grid[j + dj]) { // Check if the neighboring row exists

            for (let di = -1; di <= 1; di++) {

              // Check if the neighboring cell is within the grid and not the cell itself

              if (

                j + dj >= 0 &&

                j + dj < this.grid.length &&

                i + di >= 0 &&

                i + di < row.length &&

                !(dj === 0 && di === 0)

              ) {

                let neighbour = this.grid[j + dj][i + di]; // Get the neighboring cell

                cell.addNeighbor(neighbour); // Add the neighbor to the cell's neighbors set

              }

            }

          }

        }

      }

    }

  }

​

  // Function to calculate the next state for all cells

  next() {

    this.grid.forEach((row) => {

      row.forEach((cell) => {

        cell.next(); // Call the next function of each cell

      });

    });

  }

}

​