generic elevator program

local pullEvent = os.pullEvent
os.pullEvent = os.pullEventRaw
local password = "guest"
local debug = "debug"
while true do
term.clear()
term.setCursorPos(1, 1)
print("You are on Level X - yyyyy")
term.setCursorPos(1, 2)
print("Type List to see a listing of all floors.")
term.setCursorPos(1, 3)
print("Or enter password to open elevator doors.")
input = read()
if input == password then
    term.clear()
    term.setCursorPos(1, 1)
    print("Thank you. Door will remain open for 10 seconds")
    redstone.setBundledOutput("bottom", 2)
    sleep(10)
    redstone.setBundledOutput("bottom", 0)
end
if input == debug then
    term.clear()
    term.setCursorPos(1, 1)
    print("Debug mode activated, press CTRL + T after 5 seconds to exit program.")
    sleep(5)
    os.pullEvent = pullEvent
end
if input == "List" then
    term.clear()
    term.setCursorPos(1, 1)
    print("Level 9 - Lobby")
    term.setCursorPos(1, 2)
    print("Level 8 - Living quarters")
    term.setCursorPos(1, 3)
    print("Level 7 - Factory floor")
    term.setCursorPos(1, 4)
    print("Level 6 - Biofuels production and R&D")
    term.setCursorPos(1, 5)
    print("Level 5 - Hydroponics")
    term.setCursorPos(1, 6)
    print("Level 4 - unused")
    term.setCursorPos(1, 7)
    print("Level 3 - unused")
    term.setCursorPos(1, 8)
    print("Level 2 - unused")
    term.setCursorPos(1, 9)
    print("Level 1 - Restricted!")
    term.setCursorPos(1, 11)
    print("You are on Level X - yyyyy.")
    term.setCursorPos(1, 12)
    print("Type any command to return to previous menu.")
    input2 = read()
    if input2 == debug then
        term.clear()
        term.setCursorPos(1, 1)
        print("Debug mode activated, press CTRL + T after 5 seconds to exit program.")
        sleep(5)
        os.pullEvent = pullEvent
    end
    if input2 ~= debug then
        sleep(0.2)
    end
end
if input ~= password and input ~= debug and input ~= "List" then
    term.clear()
    term.setCursorPos(1, 1)
    print("Invalid command.")
    sleep(3)
end
end