<svg width="200px" height="200px" viewBox="0 0 200 200">
  <circle cx="30" cy="30" r="20" style="stroke: black; fill: none;"/>
  <circle cx="80" cy="30" r="20"
    style="stroke-width: 5; stroke: black; fill: none;"/>

  <ellipse cx="30" cy="80" rx="10" ry="20"
    style="stroke: black; fill: none;"/>
  <ellipse cx="80" cy="80" rx="20" ry="10"
    style="stroke: black; fill: none;"/>
</svg>