GUI android touch screen lock

local buttons = {
    { name = "1", x = 7, y = 4, width = 4, height = 3, color = colors.lightBlue },
    { name = "2", x = 13, y = 4, width = 4, height = 3, color = colors.lightBlue },
    { name = "3", x = 19, y = 4, width = 4, height = 3, color = colors.lightBlue },
    { name = "4", x = 7, y = 8, width = 4, height = 3, color = colors.lightBlue },
    { name = "5", x = 13, y = 8, width = 4, height = 3, color = colors.lightBlue },
    { name = "6", x = 19, y = 8, width = 4, height = 3, color = colors.lightBlue },
    { name = "7", x = 7, y = 12, width = 4, height = 3, color = colors.lightBlue },
    { name = "8", x = 13, y = 12, width = 4, height = 3, color = colors.lightBlue },
    { name = "9", x = 19, y = 12, width = 4, height = 3, color = colors.lightBlue },
    { name = "C", x = 7, y = 16, width = 4, height = 3, color = colors.red },
    { name = "0", x = 13, y = 16, width = 4, height = 3, color = colors.lightBlue },
    { name = "E", x = 19, y = 16, width = 4, height = 3, color = colors.green }
}

local pinFilePath = "/disk/security/PIN.config"

local function readPINFromFile()
    local file = fs.open(pinFilePath, "r")
    local pin = file and file.readLine() or "0000"
    if file then
        file.close()
    end
    return pin
end

local correctPIN = readPINFromFile()

local function drawPINScreen(enteredPIN)
    term.setBackgroundColor(colors.gray)
    term.setTextColor(colors.white)
    term.clear()

    -- Display "Enter PIN" at the top center
    term.setCursorPos((term.getSize() - #"Enter PIN") / 2 + 1, 1)
    write("Enter PIN")

    -- Display entered PIN right under "Enter PIN" text
    term.setCursorPos((term.getSize() - #enteredPIN) / 2 + 1, 2)
    write(string.rep("*", #enteredPIN))

    for _, button in ipairs(buttons) do
        paintutils.drawBox(button.x, button.y, button.x + button.width - 1, button.y + button.height - 1, button.color)
        term.setCursorPos(button.x + 1, button.y + 1)
        write(button.name)
    end
end

local function handleButtonClick(button)
    if button.name == "C" then
        -- Clear button
        return "C"
    elseif button.name == "E" then
        -- Enter button
        return "E"
    else
        return tostring(button.name)
    end
end

local function enterPIN()
    local enteredPIN = ""
    local attempts = 3

    while attempts > 0 do
        drawPINScreen(enteredPIN)
        term.setCursorBlink(false)
        term.setCursorPos(1, 18)

        local event, button, x, y = os.pullEvent("mouse_click")

        if event == "mouse_click" then
            for _, btn in ipairs(buttons) do
                if x >= btn.x and x < btn.x + btn.width and y >= btn.y and y < btn.y + btn.height then
                    local result = handleButtonClick(btn)
                    if result == "E" then
                        if enteredPIN == correctPIN then
                            term.clear()
                            term.setCursorPos(1, 1)
                            print("Access Granted!")
                            -- Perform actions upon successful entry
                            return
                        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
                    elseif result == "C" then
                        enteredPIN = ""
                    else
                        enteredPIN = enteredPIN .. result
                    end
                    break
                end
            end
        end
    end
end

enterPIN()