how to add margin in tailwind css code example

Example 1: tailwind margin

<div class="mt-8 ...">mt-8</div>
<div class="mr-8 ...">mr-8</div>
<div class="mb-8 ...">mb-8</div>
<div class="ml-8 ...">ml-8</div>

Example 2: tailwind margin

<div class="w-32 h-16 bg-fuchsia-300 ..."></div>
<div class="-mt-8 bg-fuchsia-500 ...">-mt-8</div>