OpenComputers Plug_And_Cree follower counter

local component = require("component")
local net = require("internet")
local term = require("term")
local os = require("os")
local io = require("io")
local gpu = component.gpu

JSON_LIB = "https://raw.githubusercontent.com/sziberov/OpenComputers/master/lib/json.lua"
BIGFONT_LIB = "https://raw.githubusercontent.com/iesika/iesika-OCPrograms/master/OC-bigfont/lib/bigfont.lua"

function getFontURL(size)
    return "https://raw.githubusercontent.com/iesika/iesika-OCPrograms/master/OC-bigfont/lib/bigfont-size" .. tostring(size) .. ".hex"
end

function download(url, path)
  local r = net.request(url)
  local f = io.open(path, "w")

  local chunk = r()
  while not (chunk == nil) do
    f:write(chunk)
    chunk = r()
  end

  f:close()
end

if not component.isAvailable("internet") then
  io.stderr:write("This program requires an internet card to run.")
  return
end

local status, json = pcall(require, "json")

if (not status) or json == nil then
  print("Json parser not found, downloading")

  download(JSON_LIB, "/lib/json.lua")

  status, json = pcall(require, "json")

  if (not status) or json == nil then
    print("Couldn't install json parser, aborting.")
    os.exit()
  end

  print("Json parser installed")
end

local status, bigfont = pcall(require, "bigfont")

if (not status) or bigfont == nil then
  print("BigFont library not found, downloading")

  download(BIGFONT_LIB, "/lib/bigfont.lua")

  print("Lib download complete, downlading fonts")

  for i=2,8 do download(getFontURL(i), "/lib/bigfont-size" .. tostring(i) .. ".hex") end

  status, bigfont = pcall(require, "bigfont")

  if (not status) or bigfont == nil then
    print("Couldn't install bigfont library, aborting.")
    os.exit()
  end

  print("BigFont library installed")
end

REFRESH_RATE = 5

function get_followers()
  local r = net.request("https://api.twitch.tv/helix/users/follows?to_id=167165508&first=1", {}, {["Client-ID"]="74jgk3923ql6fw2cbb5835qcnb6jrt"}, "GET")

  res = ""
  for chunk in r do
    res = res .. chunk
  end

  local code, message, _ = getmetatable(r).__index.response()

  return json:decode(res)["total"], code, message
end

function time() return math.floor(os.time() / 100) end

local h, w = gpu.getResolution()

bigfont.load(8)

local timestamp = time()

local followers, code, message = get_followers()
local start_followers = followers

while true do
  if time() - timestamp >= REFRESH_RATE then
    timestamp = time()
    followers, code, message = get_followers()
  end

  term.clear() -- clear terminal(only works on print statements, resets cursor)
  gpu.fill(1, 1, w, h, " ") -- clear screen(actual complete clear)

  print("code: " .. tostring(code))
  print("msg: " .. tostring(message))

  print("Starting followers: " .. tostring(start_followers))

  bigfont.set(2, 14, "Gained Followers: " .. tostring(followers - start_followers), 8)

  print("Next refresh: " .. tostring(REFRESH_RATE - (time() - timestamp)))

  os.sleep(0.05)
end