Router Installer

local w, h = term.getSize()

function printCentered(text, y)
    term.setCursorPos(w/2 - #text/2, y)
    term.write(text)
end

term.clear()

term.setCursorPos(1,1)
print(string.rep("-", w))
printCentered("Welcome to the GraviNet Router wizard.", 2)
printCentered("This will lead you through", 3)
printCentered("installing a new Router.", 4)
print(string.rep("-", w))
os.sleep(0.5)
print("\n")
print("Which side is your modem on?")
print("[top, bottom, back, front, left, right]")
local side = read()
print("Modem at side: "..side)
os.sleep(0.5)
print("Creating preference file...")
os.sleep(0.2)
file = fs.open("gravinet/router/pref", "w")
file.write(textutils.serialise({side=side}))
file.close()
print("Preference file created in gravinet/router/pref. Do not delete this file!")
os.sleep(0.5)
print("Removing old startup file...")
if fs.exists("startup") then
    fs.delete("startup")
end
print("Downloading Master server files...")
shell.run("pastebin","get","https://pastebin.com/5PF0kuEa","startup")
os.sleep(0.5)
print("Rebooting...")
os.sleep(0.5)
os.reboot()