<svg viewBox="0 0 1000 400">
<path d="M ${startX} 380 L ${startX + xOffset} 100 L ${startX + 2 * xOffset} 380" stroke='lightgray' stroke-width="20" fill="none"
stroke-linejoin="${linejoin}"
stroke-miterlimit="${miterlimit}"
/>
<path d="M ${startX} 380 L ${startX + xOffset} 100 L ${startX + 2 * xOffset} 380" stroke='black' stroke-width="1" fill="none"/>
</svg>