tiles = {
image =image.load("images/campp.png"),
x = 35,
y = 35,
spacey = 7,
spacex = 7
}
-- el mapa
mapSource = {
    "accccca",
    "ccihicc",
    "cihhhic",
    "chhhhhc",
    "cihhhic",
    "ccihicc",
    "accccca",
}
board = image.create(245, 241)
 
function drawTile(tile, x, y)
    tile = string.byte(tile, 1) - string.byte("a")
    local tileX = math.mod(tile, 4)
    local tileY = math.floor(tile / 4)
    board.blit(tiles.x * x, tiles.y * y, tiles.image, tiles.x * tileX + 1, tiles.y * tileY + 1, tiles.x, tiles.y, false)
end    
map = {}
for y = 1, tiles.spacey do
    line = mapSource[y]
    map[y] = {}
    for x = 1, tiles.spacex do
        tile = string.sub(line, x, x)
        map[y][x] = tile
        drawTile(tile, x - 1, y - 1)
    end
end