CC Dooor Code

-- Set monitor loc
local mon = peripheral.wrap("top")
-- Set password
local pass = "1234"
local passlen = string.len(pass)
local press = "";
tblpad = {};
for i=0,10 do
tblpad[i] = {}
    for x=0,10 do
        tblpad[i][x] = "x"
    end
end


tblpad[2][2] = "1"
tblpad[4][2] = "2"
tblpad[6][2] = "3"
tblpad[2][3] = "4"
tblpad[4][3] = "5"
tblpad[6][3] = "6"
tblpad[2][4] = "7"
tblpad[4][4] = "8"
tblpad[6][4] = "9"
tblpad[4][5] = "0"

function drawpad()
    mon.setBackgroundColor(colors.green)
    mon.setCursorPos(1,1)
    mon.write(" Code?  ")
    mon.setCursorPos(1,2)
    mon.write(" 1 2 3  ")
    mon.setCursorPos(1,3)
    mon.write(" 4 5 6 ")
    mon.setCursorPos(1,4)
    mon.write(" 7 8 9 ")
    mon.setCursorPos(1,5)
    mon.write("   0   ")
end

function countdown(c)

    for i=1,c do
        mon.setCursorPos(1,1)
        mon.write("       ")
        mon.setCursorPos(1,2)
        mon.write("       ")
        mon.setCursorPos(1,3)
        mon.write("   ".. c .."   ")
        mon.setCursorPos(1,4)
        mon.write("       ")
        mon.setCursorPos(1,5)
        mon.write("       ")
        sleep(1)
        c = c-1
    end
end

function dots()
    mon.setBackgroundColor(colors.red)
    mon.setCursorPos(1,1)
    mon.write("       ")
    mon.setCursorPos(1,2)
    mon.write("       ")
    mon.setCursorPos(1,3)
    mon.write("  ...  ")
    mon.setCursorPos(1,4)
    mon.write("       ")
    mon.setCursorPos(1,5)
    mon.write("       ")
end


function opendoor()
dots()
    --Open Door Code
    countdown(5)
    dots()
    --Close Door Code
    drawpad()
end

function wrongpass()
    mon.setBackgroundColor(colors.red)
    mon.setCursorPos(1,1)
    mon.write("       ")
    mon.setCursorPos(1,2)
    mon.write(" Wrong ")
    mon.setCursorPos(1,3)
    mon.write("       ")
    mon.setCursorPos(1,4)
    mon.write(" Code! ")
    mon.setCursorPos(1,5)
    mon.write("       ")
    sleep(2)
    countdown(5)
    drawpad()
end
drawpad()

while true do
    event, side, xPos, yPos = os.pullEvent("monitor_touch")
    if tblpad[xPos][yPos] ~= "x" then
        mon.setCursorPos(xPos, yPos)
        mon.setBackgroundColor(colors.red)
        mon.write(tblpad[xPos][yPos])
        sleep(0.2)
        mon.setCursorPos(xPos, yPos)
        mon.setBackgroundColor(colors.green)
        mon.write(tblpad[xPos][yPos])
        press = press .. tblpad[xPos][yPos]
        if string.len(press) == passlen and press == pass then
            press = ""
            opendoor()
        elseif string.len(press) == passlen and press ~= pass then
            press = ""
            wrongpass()
        end
    end
end