snippet = ""
for count in range(1, 21):
    code = f"""
      <figure class="col-md-4">
        <a
          href="https://redlineracingdivision.com/"
          data-size="1600x1067"
        >
          <img
            alt="picture"
            src="shirts/{count}.png"
            class="img-fluid"
          />
        </a>
      </figure>
        """
    snippet += code
print(snippet)