--util.lua
function generateQuads(atlas, tilewidth, tileheight) --[[ atlas is like a spritesheet. a path to the texture]]
    local sheetWidth = atlas:getWidth()/tilewidth
    local sheetHeight = atlas:getHeight()/tileheight -- we can't use local variables outside the file

    local sheetCounter = 1
    local quads = {} -- a table that will store the quads... rectangles chunks of textures

    for y = 0, sheetHeight - 1 do
        for x = 0, sheetWidth - 1 do
            quads[sheetCounter] = love.graphics.newQuad(x * tilewidth, y * tileheight, tilewidth, tileheight, atlas:getDimensions()) -- arrays are 1 indexed
            sheetCounter = sheetCounter + 1 -- he says the issue is to increment the sheet counter... i'm still getting the same error
        end
    end

    return quads
end


--[[
Error

Map.lua:69: bad argument #2 to 'draw' (Quad expected, got nil)


Traceback

[C]: in function 'draw'
Map.lua:69: in function 'render'
main.lua:34: in function 'draw'
[C]: in function 'xpcall'

]]