如何使文本框出现在多个屏幕上?

I'm coding a school assignment where I am trying to make a clock appear up the top of all screens (See picture below). Picture of Starting Screen with Clock at top (Intention is to have it go across all screens)

我不确定如何使这项工作。 我了解,如果我复制并粘贴代码,这可能会起作用,但是我尝试这样做没有成功。

Code that could prove useful: Code

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