MC-XOBAHCK,
<body>
<div class="body"></div>
<script>
let svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');;
svg.style.setProperty('width', '200px');
svg.style.setProperty('height', '126px');
svg.style.setProperty('fill', '#FF1493');
svg.style.setProperty('stroke', '#8B4513');
svg.style.setProperty('stroke-width', '2px');
svg.setAttribute('viewBox', '0 0 200 126');
let polygon = document.createElementNS('http://www.w3.org/2000/svg', 'polygon');
polygon.setAttribute('points', '1,1 200,1 200,62 1,62');
polygon.style.setProperty('fill', '#1E90FF');
svg.append(polygon);
document.querySelector('.body').append(svg);
</script>
</body>