Instructions:

$1.$ Set up a directory containing an HTML file $($named index.html$),$ a CSS file, and a JavaScript file.

$2.$ Include an img tag and two buttons within the HTML file.

$3.$ In the JavaScript file, store image links within an object or array and display one image in the img tag. Implement functionality such that clicking the left button switches to the previous image and clicking the right button switches to the next image. Ensure that if the current image is the last one, clicking the next button transitions to the first image, and if the current image is the first one, clicking the previous button transitions to the last image.

$4.$ Customize the appearance of your page by applying CSS rules in your CSS file.