// rysowanie grida
function drawGrid(){
    let container = document.getElementById("container");
    container.innerHTML = ""
    for (let i = 0; i < rows; i++) {
        for (let j = 0; j < columns; j++)    {
            let cell = document.createElement("div");
            if(grid2[i][j]) {
                cell.classList.add("alive");
            }
            cell.addEventListener("click", () => {
                cell.classList.toggle("alive");
            });
            grid[i][j] = cell;
            container.append(cell);
        }
    }
}