Andoid screen lock

-- Define your PIN
local correctPIN = "1234"

-- GUI Functions
local function drawScreen()
    term.clear()
    term.setCursorPos(1, 1)
    print("+-----+-----+-----+")
    print("|     |     |     |")
    print("|  1  |  2  |  3  |")
    print("|     |     |     |")
    print("+-----+-----+-----+")
    print("|     |     |     |")
    print("|  4  |  5  |  6  |")
    print("|     |     |     |")
    print("+-----+-----+-----+")
    print("|     |     |     |")
    print("|  7  |  8  |  9  |")
    print("|     |     |     |")
    print("+-----+-----+-----+")
    print("|     |     |     |")
    print("|  C  |  0  |  E  |")
    print("|     |     |     |")
    print("+-----+-----+-----+")
    term.setCursorPos(1, 18)
    write("Enter PIN:")
end

-- Main PIN Entry Function
local function enterPIN()
    local enteredPIN = ""
    local attempts = 3

    while attempts > 0 do
        drawScreen()
        term.setCursorBlink(false)
        term.setCursorPos(12, 18)
        write(string.rep("*", #enteredPIN))
        local _, key = os.pullEvent("key")
        local number = tonumber(string.char(key))

        if number and number >= 0 and number <= 9 then
            enteredPIN = enteredPIN .. tostring(number)
        elseif key == keys.backspace then
            enteredPIN = string.sub(enteredPIN, 1, -2)
        elseif key == keys.enter then
            if enteredPIN == correctPIN then
                term.clear()
                term.setCursorPos(1, 1)
                print("Access Granted!")
                -- Perform actions upon successful entry
                break
            else
                term.clear()
                term.setCursorPos(1, 1)
                print("Incorrect PIN. Try again.")
                attempts = attempts - 1
                if attempts == 0 then
                    print("Access Denied!")
                else
                    print("Attempts remaining: " .. attempts)
                end
                sleep(2)
                enteredPIN = ""
            end
        end
    end
end

-- Start PIN Entry
enterPIN()