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                <div class="bg1 pad1 dib top">first div</div>
<div class="bg2 pad1 dib bottom">second div</div>
<div class="bg3 pad1 dib leftX right0">third div</div>

<div class="bg1 pad1 dib
            right0X right-50X right-100 right200X right350">


                .bg1 { background: lightgray }
.bg2 { background: lightslategray }
.bg3 { background: orange }
.pad1 { padding: 20px }
.pad2 { padding: 40px }
.m1 { margin: 20px }
.m2 { margin: 40px }
.dib { display: inline-block }

div { position: absolute }
div.bg3 { position: fixed }
body { height: 1000px }

.top { top: 150px }
.right0 { right: 0px }
.bottom { bottom: 0px }
.left { left: 500px}

.right-50 { right: -50px }
.right-100 { right: -100px }
.right200 { right: 200px }
.right350 { right: 350px }

1. position: fixed acts as if we have pinned an element onto the screen; what this means is that the element is fixed in place (even when the user scrolls down the page)
2. if an element has the position property set to "fixed", if you additionally use the top, right, bottom, or left property and give it a value, it has the same result as it does with the position: absolute property.
3. The difference between position: absolute and position: fixed is the following: an absolutely positioned element will scroll with the page, while a fixed element will remain in the exact same position regardless of whether the user is scrolling the webpage or not.
4. Since we did not have enough content on the page to make it scroll, we've used the <body> tag selector and gave it the property: value pair of "height: 1000px", thus ensuring that the height of the page is greater than what is visible in the preview window. This way, we are "forcing" the scroll, so that we can observe an example of position: fixed in practice.