get("#451") -- getIcons (grid size=3)
get("#388") -- rect functions

fw, fh = 7, 15 -- font size

function findLeftBorder()
  for x = 0, w-1 do
    local nwhite = 0
    for y = 0, fh*2-1 do
      if img.getInt(x, y) == 0xFFFFFF then
        nwhite = nwhite+1
      end
    end
    if nwhite >= fh-1 then -- one row might not be white
      leftBorder = x
      return
    end
    print("x", x, "nwhite", nwhite)
  end
  error("left border not found")
end

w, h = img.width, img.height

findLeftBorder()
getIcons()

r = icons["00f8a328"] or icons["00919df2"] or icons["002afe9a"] -- the latter is in black
if r == nil then return "package statement not found" end

r = stringtorect(r)

--return r.x..", "..r.y

sx, sy = r.x, r.y-2
sx, sy = (sx-leftBorder) % fw + leftBorder, sy%fh

tbl = {}
for y = sy, h-fh, fh do
  for x = sx, w-fw, fw do
    table.insert(tbl, x..", "..y..", "..x+fw..", "..y+fh)
  end
end

return "Grid: "..table.concat(tbl, "|")