KreOS 3.0 Skylark Installer

-- ========================================
-- The KreOS 3.0 Skylark Installer
-- Written by kornichen
-- Lastly modified on 10th April 2015
-- Licensed under General Public License V3
-- ========================================

local k1 = {{0,256,256,0,0,256,},{0,0,256,0,256,},{0,0,256,256,},{0,0,256,0,256,},{0,0,256,0,0,256,},{0,256,256,0,0,256,}}
local k2 = {{0,128,128,0,0,128,},{0,0,128,0,128,},{0,0,128,128,},{0,0,128,0,128,},{0,0,128,0,0,128,},{0,128,128,0,0,128,}}

local w, h = term.getSize()

term.setTextColor(colors.lightGray)
term.setBackgroundColor(colors.white)
term.clear()
term.setCursorPos((w / 2) - (string.len("KreOS 3.01 Skylark by kornichen") / 2), 2)
term.write("KreOS 3.01 Skylark by kornichen")

local function setStatusText(statusText)
    term.setTextColor(colors.black)
    term.setBackgroundColor(colors.white)
    term.setCursorPos((w / 2) - (string.len(statusText) / 2), h - 2)
    term.clearLine()
    term.write(statusText)
end

function installKreOS()
    setStatusText("Installing")
    setStatusText("Getting installation list")
    local installationList = textutils.unserialize(http.get("http://www.lxnd.me/kreos/installationList").readAll())
    setStatusText("Downloading files")
    local file = ""
    for i = 1, #installationList do
        file = fs.open(installationList[i], "w")
        file.write(http.get("http://www.lxnd.me/kreos/files" .. installationList[i]).readAll())
        file.close()
        setStatusText("Downloaded " .. installationList[i] .. " (" .. i .. "/" .. #installationList .. ")")
    end
    local newestVersion = http.get("http://www.lxnd.me/kreos/version").readLine()
    setStatusText("Completing installation")
    file = ""
    if fs.exists("/system/config/version") then
        fs.delete("/system/config/version")
    end
    file = fs.open("/system/config/version", "w")
    file.writeLine(newestVersion)
    file.close()
    setStatusText("Installation complete. Rebooting")
    os.reboot()
end

function drawLogo()
    while true do
        paintutils.drawImage(k1, (w / 2) - 2, (h / 2) - 2)
        sleep(0.075)
        term.setBackgroundColor(colors.white)
        for i = 1, 6 do
            term.setCursorPos(1, ((h / 2) - 3) + i)
            term.clearLine()
        end
        paintutils.drawImage(k2, (w / 2) - 2, (h / 2) - 2)
        sleep(0.5)
        term.setBackgroundColor(colors.white)
        for i = 1, 6 do
            term.setCursorPos(1, ((h / 2) - 3) + i)
            term.clearLine()
        end
        paintutils.drawImage(k1, (w / 2) - 2, (h / 2) - 2)
        sleep(0.075)
        term.setBackgroundColor(colors.white)
        for i = 1, 6 do
            term.setCursorPos(1, ((h / 2) - 3) + i)
            term.clearLine()
        end
        sleep(0.5)
    end
end

parallel.waitForAny(installKreOS, drawLogo)