ComputerCraft - PasswordPistonDoor

local program = [[
    os.pullEvent = os.pullEventRaw
    redstone.setOutput("back", true)
    while true do
        term.clear()
        term.setCursorPos(1, 1)
        print("Password?")
        if read("*") == password then
            redstone.setOutput("back", false)
            sleep(2)
            redstone.setOutput("back", true)
        end
    end
]]

print("Password?")
local password = read()

if response then
    local file = fs.open("startup.lua", "w")
    file.write("local password = \""..password.."\"\n"..program)
    file.close()
end

-- Finish
os.reboot()