<table>
  <tr>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
  </tr>
  <tr>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
  </tr>
  <tr>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
  </tr>
  <tr>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
  </tr>
  <tr>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
    <td>💁🏼</td>
  </tr>
</table>
table {
  --b:5px;
  margin: 0 auto;
  border-collapse: collapse;
  background:
    conic-gradient(from 90deg at var(--b) var(--b),#0000 90deg,#000 0) 
    calc(-1*var(--b)) calc(-1*var(--b))/
    calc((100% + var(--b))/5) calc((100% + var(--b))/5);
}
table td {
  padding: 1rem;
}

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