<!DOCTYPE html>
<meta charset="utf-8" />
<title>CSS Reftest Reference</title>
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com" />
<style>
body {
  margin: 0;
  overflow: clip;
}
.test:nth-of-type(even) {
  color: white;
}
.test {
  position: absolute;
  width: 0;
  transform-origin: 0 0;
  border-right: 25px solid transparent;
  border-top: calc(25px * var(--scale)) solid currentcolor;
  transform: scale3d(var(--scale), 1, 1);
}
</style>
<body>
<script>
"use strict";
for (let i = 1; i < 14; ++i) {
  const test = document.createElement("div");
  test.className = "test";
  test.style.setProperty("--scale", i * 4);
  test.style.setProperty("z-index", -i);
  document.body.appendChild(test);
}
</script>
</body>