Lights Out

local grid = {}
-- Defining the 2D table as grid

local maxX,maxY = term.getSize()
-- Getting the dimensions of the screen for the game

local colours = {
    on = colors.green,
    off = colors.red
}
-- Defining the colours used below

for x=1,maxX do

  grid[x] = {}

  for y=1,maxY do

    grid[x][y] = "on"
  end
end
-- Making the 2D table with "on" as all of the values

local function checkWin()

  for i=1,#grid do
    for j=1,#grid[i] do
      if grid[i][j] == "on" then

        return false
        -- If there is a value that is "on" it will immediately return false and prevent further unecessary iterations
      end
    end
  end
  -- Iterating over the 2D table

  return true
  -- If the function hasn't already returned false, it will return true meaning that the user has won
end
-- Seeing if the user has won the game or not

local function toggle(x,y)
  if grid[x][y] == "on" then

    grid[x][y] = "off"
  else

    grid[x][y] = "on"
  end
end
-- Toggling the status of a single tile in the 2D table

local function toggleAdjacent(x,y)

  toggle(x,y)
  -- Toggling the tile that the user has clicked. I don't need an if to see if it exists since i already know it exists

  if grid[x+1] then

    toggle(x+1,y)
  end

  if grid[x-1] then

    toggle(x-1,y)
  end

  if grid[x][y+1] then

    toggle(x,y+1)
  end

  if grid[x][y-1] then

    toggle(x,y-1)
  end
  -- First seeing if the 4 adjacent tiles exist and then if they do, it will toggle them
end

local function displayGrid()
  for y=1,#grid do
    for x=1,#grid[y] do

      term.setCursorPos(x,y)
      -- Setting the cursor's position to what the for loop's are up to

      if grid[x][y] == "on" then

        term.setBackgroundColor(colours.on)
        -- Displaying the on colour if the tile is on
      else

        term.setBackgroundColor(colours.off)
        -- Displaying the off colour if the tile is off
      end

      term.write(" ")
      -- displaying the background without text
    end
  end
end
-- Displaying the 2D table so that the user can see whats been turned on and off

while not checkWin() do
  -- Only iterating while the user hasn't won the game

  displayGrid()

  local event, button, clickX, clickY = os.pullEvent("mouse_click")
  -- Getting where the user has clicked

  toggleAdjacent(clickX,clickY)
  -- toggling the adjacent tiles aswell as the tile the user has clicked on

end

term.setBackgroundColor(colors.black)
shell.run("clear")
print("You Win!")
sleep(2)
-- Displaying the win message