style.css

html, body {
  margin: 0;
}

canvas {
  border: 1px solid black;
  background: black;
  position: fixed;
  top: 0;
}

.sky-container {
  height: 100vh;
  width: 100vw;
  position: fixed;
  top: 0;
}

.sun {
  position: fixed;
  right: 30%;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background-color: white;
  opacity: 0.9;
}

.ray_box {
  position: absolute;
  margin: auto;
  top: 0px;
  left: 0;
  right: 0;
  bottom: 0;
  width: 70px;
  -webkit-animation: ray_anim 120s linear infinite;
  animation: ray_anim 120s linear infinite;
}

.ray {
  background: -webkit-gradient(linear, left top, left bottom, from(rgba(255, 255, 255, 0)), color-stop(50%, rgba(255, 255, 255, 0.8)), to(rgba(255, 255, 255, 0)));
  background: linear-gradient(top, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.8) 50%, rgba(255, 255, 255, 0) 100%);
  margin-left: 10px;
  border-radius: 80% 80% 0 0;
  position: absolute;
  opacity: 0.1;
}

.ray1 {
  height: 170px;
  width: 30px;
  -webkit-transform: rotate(180deg);
  top: -175px;
  left: 15px;
}

.ray2 {
  height: 100px;
  width: 8px;
  -webkit-transform: rotate(220deg);
  top: -90px;
  left: 75px;
}

.ray3 {
  height: 170px;
  width: 50px;
  -webkit-transform: rotate(250deg);
  top: -80px;
  left: 100px;
}

.ray4 {
  height: 120px;
  width: 14px;
  -webkit-transform: rotate(305deg);
  top: 30px;
  left: 100px;
}

.ray5 {
  height: 140px;
  width: 30px;
  -webkit-transform: rotate(-15deg);
  top: 60px;
  left: 40px;
}

.ray6 {
  height: 90px;
  width: 50px;
  -webkit-transform: rotate(30deg);
  top: 60px;
  left: -40px;
}

.ray7 {
  height: 180px;
  width: 10px;
  -webkit-transform: rotate(70deg);
  top: -35px;
  left: -40px;
}

.ray8 {
  height: 120px;
  width: 30px;
  -webkit-transform: rotate(100deg);
  top: -45px;
  left: -90px;
}

.ray9 {
  height: 80px;
  width: 10px;
  -webkit-transform: rotate(120deg);
  top: -65px;
  left: -60px;
}

.ray10 {
  height: 190px;
  width: 23px;
  -webkit-transform: rotate(150deg);
  top: -185px;
  left: -60px;
}

@-webkit-keyframes ray_anim {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}