ComputerCraft Password Door

os.pullEvent = os.pullEventRaw
local pass = "" --Enter your pass-phrase here.
local bypass = "" --Enter a pass-phrase to escape to the system here.
if pass == "" or bypass == "" then
    print("Please set the password and bypass phrase before running the program by editing it.")
    return
elseif pass == bypass then
    print("Please make sure your password and bypass phrase are not the same.")
    return
end
while true do
    term.clear()
    term.setCursorPos(1, 1)
    write("Enter password: ")
    input = read("*")
    if input == pass then
        term.setTextColor(colors.green)
        print("Access granted.")
        redstone.setOutput("left", true) --Make sure to replace "left" with the side the door is on.
        pcall(sleep,3) --Set the door open time here (seconds).
        redstone.setOutput("left", false)
        term.setTextColor(colors.white)
    elseif input == bypass then
        term.setTextColor(colors.green)
        print("System bypass granted.")
        term.setTextColor(colors.white)
        return
    else
        term.setTextColor(colors.red)
        print("Access denied.")
        term.setTextColor(colors.white)
        pcall(sleep,2)
    end
end