I have recently gotten an SVG snippet from some website, shown below. Although this is doing somewhat similar to what I want (a half circle), I am having issues fixing it to accommodate my needs. Could someone explain what each part of the following snippet means?
<svg width="256" height="256">
<path d="M 128,128 L 128,0 A 128,128 1 0,1 256,128 Z" />
</svg>