How can I change my cursor back to normal?

You know the little arrow that moves with the mouse to click on things? Well, I changed it to a basketball from a pop up. But, I have heard that it slows your computer. So, how do i change it back to the little white arrow? Thanks
How can I change my cursor back to normal?
~* go to ur start menu, then settings/control pannel, and click on mouse =]*~

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Name for a black cat