sample

#! /bin/lua
package.path = "./?.lua;"..package.path

local lib = require "libconnect4"
lib.init()

local function displayGrid()
  local line
  for y = lib.sizeY, 1, -1 do
    line = ""
    for x = 1, lib.sizeX do
      local char = lib.grid[x][y] == 1 and " X" or lib.grid[x][y] == 0 and "  " or " O"
      line = line .. char
    end
    print(line)
  end
  line = ""
  for i = 1, lib.sizeX do
    line = line .. " "..i
  end
  print(line)
end

local player = 1
local coords = {}
while true do
  displayGrid()
  print("Your move, player "..player..". Please enter a column number.")
  coords.x = tonumber(io.read())
  if coords.x then
    coords.y = lib.addPiece(coords.x, player)
    if coords.y then
      if lib.checkWin(coords) then
        print("Player "..player.." wins!")
        break
      end
      if player == 1 then
        player = 2
      else
        player = 1
      end
    end
  end
end