Accelstepper library using arduino mega problem

How can i use the accelstepper library?
Can someone help me please ,because this is my last project.
Please some help me about this topic.

Post the code that you have tried and explain what it does, and what you want it to do.
And please use the code button </> so your code looks like this and is easy to copy to a text editor

...R

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DO NOT CROSS-POST, CROSS-POSTING WASTES TIME.