<h3>Tuvalu</h3>

<div class="flag tuvalu">
  <div class="tuvalu__star"></div>
  <div class="tuvalu__star"></div>
  <div class="tuvalu__star"></div>
  <div class="tuvalu__star"></div>
  <div class="tuvalu__star"></div>
  <div class="tuvalu__star"></div>
  <div class="tuvalu__star"></div>
  <div class="tuvalu__star"></div>
  <div class="tuvalu__star"></div>

  <div class="tuvalu__left__top">
    <div class="tuvalu__plus">
      <div class="plus"></div>
    </div>
    <div class="tuvalu__x">
      <div class="x__strip-1"></div>
      <div class="x__strip-2"></div>
    </div>
  </div>
</div>

* {
  box-sizing: border-box;
  margin: 0;
}

body {
  width: 100%;
  height: 100vh;
  background-color: rgb(221, 239, 255);
  display: grid;
  place-items: center;
  font-family: cursive;
  font-weight: bold;
}

h3 {
  position: absolute;
  text-align: center;
  top: 20px;
}

/* Main Style Stars from here  */
.flag {
  position: relative;
  width: 300px;
  height: 200px;
  box-shadow: 0 0 1px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.tuvalu {
  background: #009cde;
}

.tuvalu__left__top {
  width: 50%;
  height: 50%;
  display: grid;
  place-items: center;
  overflow: hidden;
  position: relative;
  background-color: #012169;
}

.tuvalu__plus {
  z-index: 1;
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 7px white) drop-shadow(7px 0 white)
    drop-shadow(-7px 0 white) drop-shadow(0 -7px white);
}

.tuvalu__plus .plus {
  width: 100%;
  height: 100%;
  background-color: #c8102e;
  clip-path: polygon(
    0% 40%,
    43% 40%,
    43% 0%,
    58% 0%,
    58% 40%,
    100% 40%,
    100% 60%,
    58% 60%,
    58% 100%,
    43% 100%,
    43% 60%,
    0% 60%
  );
}

.tuvalu__x {
  position: absolute;
  inset: 0;
}

.tuvalu__x > .x__strip-1,
.tuvalu__x > .x__strip-2 {
  position: relative;
  background-color: white;
  width: 150%;
  height: 20px;
  transform: rotate(-32deg) scalex(1.2) translate(-13px, 15px);
}

.tuvalu__x > .x__strip-2 {
  transform: rotate(32deg) scalex(1.2) translate(13px, 37px);
}

.tuvalu__x > .x__strip-1::before,
.tuvalu__x > .x__strip-1::after,
.tuvalu__x > .x__strip-2::before,
.tuvalu__x > .x__strip-2::after {
  position: absolute;
  background-color: #c8102e;
  content: "";
  width: 35%;
  height: 14px;
}

.tuvalu__x > .x__strip-1::before,
.tuvalu__x > .x__strip-2::before {
  top: 3px;
}

.tuvalu__x > .x__strip-1::after,
.tuvalu__x > .x__strip-2::after {
  bottom: 3px;
  left: 35%;
}

/* Tuvalu Stars */
.tuvalu__star {
  position: absolute;
  height: 25px;
  aspect-ratio: 1;
  background: #fedd00;
  transform: rotate(-35deg);
  margin: 5px;
  clip-path: polygon(
    50% 0%,
    61% 35%,
    98% 35%,
    68% 57%,
    79% 91%,
    50% 70%,
    21% 91%,
    32% 57%,
    2% 35%,
    39% 35%
  );
}

.tuvalu__star:nth-child(1) {
  transform: rotate(0deg);
  left: 87%;
  top: 26%;
}
.tuvalu__star:nth-child(2) {
  left: 81%;
  top: 39%;
}
.tuvalu__star:nth-child(3) {
  left: 73%;
  top: 44%;
}
.tuvalu__star:nth-child(4) {
  transform: rotate(0deg);
  left: 87%;
  top: 57%;
}
.tuvalu__star:nth-child(5) {
  transform: rotate(0deg);
  left: 80%;
  top: 66%;
}
.tuvalu__star:nth-child(6) {
  left: 64%;
  top: 66%;
}
.tuvalu__star:nth-child(7) {
  left: 73%;
  bottom: 8%;
}
.tuvalu__star:nth-child(8) {
  left: 64%;
  bottom: 0%;
}
.tuvalu__star:nth-child(9) {
  transform: rotate(0deg);
  left: 53%;
  bottom: -3%;
}