ComputerCraft Door Lock

os.pullEvent = os.pullEventRaw -- Prevent user from terminating program

local side = "" -- Side to output redstone
local password = "" -- Password to type to gain access
local admin = "" -- Password to terminate program
local time = 0 -- Enter time to output redstone for (seconds)
local open = true -- Redstone value to output if door is closed

while true do

    rs.setOutput(side, open) -- Makes sure redstone is outputting correctly

    term.clear()
    term.setCursorPos(1, 1)

    write("Enter access code: ")
    local input = read("*")

    if input == password then

        print("Access granted!")
        print("Opening door for " .. time .. " seconds...")
        rs.setOutput(side, not open)
        sleep(time)
        rs.setOutput(side, open)

    elseif input == admin then

        write("Terminating program in 3")
        sleep(1)
        write(", 2")
        sleep(1)
        print(", 1")
        sleep(1)
        break;

    else

        print("Access denied")
        sleep(2)

    end
end