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HTML 

              
                <main class="main">
  <div class="sun"></div>
  <div class="water"></div>
  <div class="cliff">
    <div class="cliff-top"></div>
    <div class="cliff-shadow"></div>
  </div>
  <div class="tree">
    <div class="tree-base"></div>
    <div class="tree-shadow"></div>
  </div>
  <div class="boat">
    <div class="boat-base"></div>
    <div class="boat-mast"></div>
    <div class="boat-sail-1"></div>
    <div class="boat-sail-2"></div>
    <div class="boat-sail-3"></div>
    <div class="boat-shadow"></div>
  </div>
</main>
!

CSS 

              
                
@function generateStars ($amount) {
  $starMap: ();
  @for $i from 1 through $amount {
    $starMap: append($starMap, unquote('#{random(550)}px #{random(550)}px #fff'), comma); 
  }

  @return $starMap;

}

body {
  background-color: #234;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.main {
  background-color: #664653;
  width: 550px;
  height: 550px;
  position: relative;
  overflow: hidden;
  box-shadow: 10px 10px 20px 0px rgba(0,0,0,0.3);
  z-index: 1;
  
  &:after {
    content: "";
    position: absolute;
    z-index: -1;
    width: 2px;
    height: 2px;
    background: transparent;
    opacity: 0.4;
    box-shadow: generateStars(400);
  }
}

.water, .sun, .cliff, .cliff-top, .tree, .tree-shadow, .tree-base, .boat  {
  position: absolute;
}

.water {
  background-color: #664653;
  width: 100%;
  height: 60px;
  bottom: 0;
}

.sun {
  background-color: #F8FCFB;
  width: 240px;
  height: 240px;
  left: 80px;
  top: 180px;
  border-radius: 100%;
  box-shadow: 
    0px 0px 50px 10px rgb(255, 166, 132),
    0px 0px 0 90px rgba(218,113,65,0.7),
    0px 0px 0 170px rgba(218,113,65,0.3),
    0px 0px 0 250px rgba(218,113,65,0.2);
}

.cliff {
  width: 380px;
  right: 0;
  bottom: 0;
  height: 200px;
}

.cliff-top {
  border-top: 120px solid #678EC5;
  border-right: 3000px solid transparent;
  border-bottom: 0 solid transparent;
  border-left: 320px solid transparent;
}

.cliff-shadow {
  border-top: 224px solid #111E31;
  border-right: 0 solid transparent;
  border-bottom: 16px solid transparent;
  border-left: 77px solid transparent;
}

.tree {
  right: 65px;
  bottom: 170px;
  width: 200px;
  height: 180px;
  z-index: 1;
}

.tree-base {
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(65deg, #111F03 8%, transparent 8.5%),
    linear-gradient(-65deg, #28420d 8%, transparent 8.5%),
    linear-gradient(65deg, #244408 10%, transparent 10.5%),
    linear-gradient(-65deg, #46612E 10%, transparent 10.5%),
    linear-gradient(65deg, #0a1302 12%, transparent 12.5%),
    linear-gradient(-65deg, #28420d 12%, transparent 12.5%);

  background-position:
    100px 80px,
    100px 80px,
    100px 110px,
    100px 110px,
    100px 140px,
    100px 140px;
}

.tree-base:before,
.tree-shadow:before {
  content: "";
  position: absolute;
  width: 10px;
  height: 60%;
  bottom: 0;
  left: calc(50% - 6px);
  background-color: #654415;
  z-index: -1;
  box-shadow: -5px 0 inset rgba(0,0,0,0.3);
}

.tree-shadow {
  opacity: 0.5;
  top: -2px;
  left: -1px;
  z-index: -1;
  transform-origin: bottom;
  transform: rotate(114deg) skew(7deg, 35deg) scale(0.5, 1.5);
  filter: blur(1px);
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(65deg, #000 8%, transparent 15.5%),
    linear-gradient(-65deg, #000 8%, transparent 15.5%),
    linear-gradient(65deg, #000 10%, transparent 15.5%),
    linear-gradient(-65deg, #000 10%, transparent 15.5%),
    linear-gradient(65deg, #000 12%, transparent 15.5%),
    linear-gradient(-65deg, #000 12%, transparent 15.5%);

  background-position:
    100px 80px,
    100px 80px,
    100px 110px,
    100px 110px,
    100px 140px,
    100px 140px;
}

.tree-shadow:before {
  background-color: #000;
}

.boat {
  width: 100px;
  height: 100px;
  bottom: 60px;
  left: 10px;
}

.boat-base {
  position: absolute;
  border-right: 16px solid transparent;
  border-top: 25px solid #151C30;
  border-left: 6px solid transparent;
  width: 100%;
  bottom: 0;
}


.boat-shadow {
  transform: scale(1, -0.5);
  opacity: 0.4;
  position: absolute;
  border-right: 16px solid transparent;
  border-top: 25px solid #151C30;
  border-left: 6px solid transparent;
  width: 100%;
  bottom: -18px;
  filter: blur(4px);
}

.boat-mast {
  width: 4px;
  height: 30px;
  position: absolute;
  background-color: #151C30;
  top: 45px;
  left: 40px;
  box-shadow: 
    28px 0 0 #151C30,
    52px 0 0 #151C30;
}

.boat-sail-1 {
  width: 0;
  height: 40px;
  border-right: 14px solid transparent;
  border-bottom: 64px solid #151C30;
  border-top: 0 solid transparent;
  border-left: 46px solid transparent;
  position: absolute;
  top: -35px;
  left: 5px;
  transform: rotate(5deg);
} 

.boat-sail-2 {
  width: 0;
  height: 30px;
  border-right: 14px solid transparent;
  border-bottom: 56px solid #151C30;
  border-top: 0 solid transparent;
  border-left: 42px solid transparent;
  position: absolute;
  top: -17px;
  left: 30px;
  transform: rotate(-6deg);
}

.boat-sail-3 {
  width: 0;
  height: 30px;
  border-right: 27px solid transparent;
  border-bottom: 56px solid #151C30;
  border-top: 0 solid transparent;
  border-left: 0px solid transparent;
  position: absolute;
  top: -15px;
  left: 83px;
  transform: rotate(-6deg);
}
!

JS
!
999px

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