setfenv(1, _G)
local DEMO = {}

DEMO.Author = "CapsAdmin"
DEMO.Title = "game of life????"

local board = {{}}
local res = 2

function DEMO:OnStart(w, h)
    for x = -res, w+res, res do
    for y = -res, h+res, res do
        board[x] = board[x] or {}
        board[x][y] = board[x][y] or math.random() > 0.5 and 1 or 0
    end
    end
end

local function count(board, x,y)
    return
        board[x-res][y-res] +
        board[x][y-res] +
        board[x+res][y-res] +
        board[x+res][y] +
        board[x+res][y+res] +
        board[x][y+res] +
        board[x-res][y+res] +
        board[x-res][y]
end

function DEMO:OnDraw(w, h)
    surface.SetDrawColor(255, 255, 255, 255)

    for x = 0, w, res do
    for y = 0, h, res do
        if board[x][y] == 1 then
            local neighbours = count(board, x,y)

            -- Any live cell with fewer than two live neighbours dies, as if caused by under-population.
            if neighbours < 2 then
                board[x][y] = 0
            end

            -- Any live cell with two or three live neighbours lives on to the next generation.
            if neighbours == 2 or neighbours == 3 then
                continue
            end

            -- Any live cell with more than three live neighbours dies, as if by overcrowding.
            if neighbours > 3 then
                board[x][y] = 0
            end

            surface.DrawRect(x,y, res, res)
        end

        if board[x][y] == 0 then
            -- Any dead cell with exactly three live neighbours becomes a live cell, as if by reproduction.
            if neighbours == 3 then
                board[x][y] = 1
            end
        end
    end
    end
end

demoman.AddDemo(DEMO, true)