my os installer :)

os.pullEvent = os.pullEventRaw
--setup functons
function cls()
  term.clear()
end
function pos(x,y)
 term.setCursorPos(x,y)
end
function bc(c)
  term.setBackgroundColor(c)
end
function tc(c)
  term.setTextColor(c)
end
--pastebin stuff
local function get(paste)
    local response = http.get(
        "http://pastebin.com/raw/"..textutils.urlEncode( paste )
    )
    if response then
        local sResponcse = response.readAll()
        response.close()
        return sResponcse
    else
        error(paste)
    end
end
local function pastebin(sCode,path)
    local sFile = path
    local sPath = sFile
    if fs.exists( sPath ) then
        error("file exists")
    end
    --gets the contents from pastebin
    local res = get(sCode)
    if res then
        local file = fs.open( sPath, "w" )
        file.write( res )
        file.close()
    end
end
--error checking function
function Error(err)
    local size = { term.getSize() }
    tc(colors.white)
    bc(colors.blue)
    cls()
    pos(1,1)
    write("+")
    write(string.rep("=",size[1]-2))
    write("+")
    pos(1,size[2])
    write("+")
    write(string.rep("=",size[1]-2))
    write("+")
    function g(x)
    local y = 2
    while y<size[2] do
      pos(x,y)
      write("|")
      y = y+1
    end
    end
    g(1)
    g(size[1])
    local function cT(t,l)
        local w,h = term.getSize()
        pos(math.floor(w/2-t:len()/2 +.5),l)
        write(t)
    end
    cT("Error!",3)
    pos(2,4)
    write(string.rep("-",size[1]-2))
    cT(err,6)
    sleep(2)
    pos(2,size[2]-1)
end
--Updates files
local function setup()
--deleteing prior os
    print("Setting up files")
    if fs.exists("os") then
        fs.delete("os")
    end
--make directorys
    print("Installing directorys")
    fs.makeDir("os")
    fs.makeDir("os/APIS")
    fs.makeDir("os/files")
    fs.makeDir("os/files/UserData")
    fs.makeDir("os/images")
    fs.makeDir("os/images/icons")
    fs.makeDir("os/programs")
    fs.makeDir("os/users")
    fs.makeDir("os/users/Admin")
--get files
    print("Installing Main files")
    pastebin("RNNJq9ng","os/boot")
    pastebin("nudDqAKx","os/os")
    pastebin("TnfNSPja","os/login")
--Main APIS
    print("Installing APIS")
    pastebin("vSQEBHjZ","os/APIS/A")
    pastebin("BqUbtktC","os/APIS/update")
    pastebin("H44JHjDF","os/APIS/fig")
    pastebin("fh7vKWu5","os/APIS/buf")
    pastebin("BhqTBiNE","os/APIS/manage")
    pastebin("cQ4qpT1k","os/APIS/PastebinGet")
    pastebin("nmvJHyBB","os/APIS/peripherals")
--Config files
    print("Installing Config files")
    pastebin("pNKEE5hz","os/files/config")
    pastebin("DYF22zCN","os/files/colorsC")
    pastebin("xDRFMw5k","os/files/UserData/Uconfig")
--Admin files
    print("Installing Admin files")
    pastebin("2akSg4Yz","os/users/Admin/Uconfig")
--Main Images
    print("Installing Images")
    pastebin("TBpgmKAN","os/images/boot")
    pastebin("is5w4ehg","os/images/input")
    pastebin("V1h8nasT","os/images/update")
    pastebin("WecmC3HF","os/images/config")
    pastebin("2swxhSDt","os/images/setup")
    pastebin("6yx5M49j","os/images/AsciiArt")
    pastebin("FQEQDx7U","os/images/default")
    pastebin("gu3WEEX1","os/images/icons/blank")
    pastebin("yw3wtZSk","os/images/icons/icon1")
--added images
    print("Installing Icons")
    pastebin("MtaqZ9fa","os/images/icons/fileM")
    pastebin("M4Sb4JBm","os/images/icons/test")
--added programs
    print("Installing added Programs")
    pastebin("C3KUFWWC","os/programs/ice")
    pastebin("BCTAxDsP","os/programs/test") --Remove in First Uconfig
--Create startup file
    print("Installing startup and Configrations")
    local file = fs.open( "startup", "w" )
    file.writeLine("term.clear()")
    file.writeLine("os.loadAPI('os/APIS/peripherals')")
    file.writeLine("os.loadAPI('os/APIS/buf')")
    file.writeLine("os.loadAPI('os/APIS/A')")
    file.writeLine("shell.run('os/boot')")
    file.close()
    print("Install Done")
    sleep(2)
--Set up file
    pastebin("CBd0hMBR","os/files/setup")
end
function dm()
        bc(colors.black)
        tc(colors.white)
        cls()
        local function cT(t,l)
            local w,h = term.getSize()
            pos((math.floor(w/2-t:len()/2 +.5)),l)
            write(t)
        end
        cT("Updating OS",1)
        print(string.rep("=",51))
end
function main()
    dm()
    setup()
end
local ok, err = pcall(main)
if not ok then
    Error(err)
else
    shell.run("os/files/setup")
end