How can I dynamically repeat grid-template-areas

I have a site on WordPress and a section where the user adds any number of photos. The section is made with grid. Now the problem is that by default there are 10 photos in the section. But when the user adds more, the grid breaks. How can I make the grid repeat?

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<!-- language: lang-css -->

.grid {
  display: grid;
  grid-template-rows: auto;
  grid-template-columns: repeat(5, 1fr);
  grid-gap: 30px;
  grid-template-areas: "one two three four five" "six six seven seven eight" "nine ten seven seven eight";
}

.grid .grid-item:nth-child(1) {
  grid-area: one;
}

.grid .grid-item:nth-child(2) {
  grid-area: two;
}

.grid .grid-item:nth-child(3) {
  grid-area: three;
}

.grid .grid-item:nth-child(4) {
  grid-area: four;
}

.grid .grid-item:nth-child(5) {
  grid-area: five;
}

.grid .grid-item:nth-child(6) {
  grid-area: six;
}

.grid .grid-item:nth-child(7) {
  grid-area: seven;
}

.grid .grid-item:nth-child(8) {
  grid-area: eight;
}

.grid .grid-item:nth-child(9) {
  grid-area: nine;
}

.grid .grid-item:nth-child(10) {
  grid-area: ten;
}

<!-- language: lang-html -->

<div class="grid">
  <div class="grid-item">GridItem1</div>
  <div class="grid-item">GridItem2</div>
  <div class="grid-item">GridItem3</div>
  <div class="grid-item">GridItem4</div>
  <div class="grid-item">GridItem5</div>
  <div class="grid-item">GridItem6</div>
  <div class="grid-item">GridItem7</div>
  <div class="grid-item">GridItem8</div>
  <div class="grid-item">GridItem9</div>
  <div class="grid-item">GridItem10</div>
</div>

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Don't use grid areas if you want to have a repeating behavior. Simply define the number of columns or rows. I wrote a detailed article about such technique: https://css-tricks.com/exploring-css-grids-implicit-grid-and-auto-placement-powers/

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<!-- language: lang-css -->

.grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-gap: 30px;
}
.grid > * {
  border: 1px solid red;
}
.grid .grid-item:nth-child(10n + 6) {
  grid-column: 1/span 2;
}
.grid .grid-item:nth-child(10n + 7) {
  grid-column: 3/span 2;
}
.grid .grid-item:nth-child(10n + 7),
.grid .grid-item:nth-child(10n + 8) {
  grid-row: span 2;
}

<!-- language: lang-html -->

<div class="grid">
  <div class="grid-item">GridItem 1</div>
  <div class="grid-item">GridItem 2</div>
  <div class="grid-item">GridItem 3</div>
  <div class="grid-item">GridItem 4</div>
  <div class="grid-item">GridItem 5</div>
  <div class="grid-item">GridItem 6</div>
  <div class="grid-item">GridItem 7</div>
  <div class="grid-item">GridItem 8</div>
  <div class="grid-item">GridItem 9</div>
  <div class="grid-item">GridItem 10</div>
  <div class="grid-item">GridItem 11</div>
  <div class="grid-item">GridItem 12</div>
  <div class="grid-item">GridItem 13</div>
  <div class="grid-item">GridItem 14</div>
  <div class="grid-item">GridItem 15</div>
  <div class="grid-item">GridItem 16</div>
  <div class="grid-item">GridItem 17</div>
  <div class="grid-item">GridItem 18</div>
  <div class="grid-item">GridItem 19</div>
  <div class="grid-item">GridItem 20</div>
</div>

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