class Display:
    def __init__(self, driver=None):
        self.driver = driver
        self.commands = []

    def clear(self):
        self.commands.append(("clear",))

    def text(self, x, y, value, size=1):
        self.commands.append(("text", x, y, str(value), size))

    def rect(self, x, y, w, h, filled=False):
        self.commands.append(("rect", x, y, w, h, filled))

    def flush(self):
        if not self.driver:
            return

        for command in self.commands:
            name = command[0]

            if name == "clear":
                self.driver.clear()
            elif name == "text":
                _, x, y, value, size = command
                self.driver.text(x, y, value, size)
            elif name == "rect":
                _, x, y, w, h, filled = command
                self.driver.rect(x, y, w, h, filled)

        self.commands = []