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HTML

              
                <div class="bicycle-container">
  <div class="wheel back-wheel">
    <div class="tire"></div>
    <div class="rim"></div>
    <div class="spokes"></div>
    <div class="spokes"></div>
    <div class="hub"></div>
  </div>
  <div class="wheel front-wheel">
    <div class="tire"></div>
    <div class="rim"></div>
    <div class="spokes"></div>
    <div class="spokes"></div>
    <div class="hub"></div>
  </div>
  <div class="gear">
    <div class="gear-red"></div>
    <div class="tube pedal-tube"></div>
    <div class="pedal"></div>
  </div>
  <div class="tube chain-tube"></div>
  <div class="tube seat-tube-back"></div>
  <div class="tube seat-tube-front"></div>
  <div class="tube seat-tube-post"></div>
  <div class="tube top-tube"></div>
  <div class="tube top-handlebar-tube"></div>
  <div class="tube top-handlebar-tube2"></div>
  <div class="tube down-tube"></div>
  <div class="tube head-tube"></div>
  <div class="tube head-tube-post"></div>
  <div class="saddle"></div>
  <div class="handlebars"></div>
</div>
<div class="ground-container">
  <div class="ground ground1"></div>
  <div class="ground ground2"></div>
  <div class="ground ground3"></div>
</div>
              
            
!

CSS

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

html, body {
  width: 100%;
  height: 100%;
}

body {
  background: #252525;
}

$primary: #151515;
$secondary: crimson;
$wheelRadius: 120px;
$tubeHeight: 5px;
$tubeWidth: 100px;
$saddleWidth: 50px;
$saddleHeight: 10px;

.bicycle-container {
  position: absolute;
  margin: auto;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  max-width: 350px;
  height: 300px;
  overflow: hidden;
  .wheel {
    position: absolute;
    margin: auto;
    top: 0;
    bottom: 0;
    width: $wheelRadius;
    height: $wheelRadius;
    box-shadow: 0 10px 15px -12px rgba(0, 0, 0, 0.3);
    .tire {
      position: absolute;
      margin: auto;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      width: inherit;
      height: inherit;
      border-radius: 50%;
      border: 10px solid $primary;
      z-index: 2;
    }
    .rim {
      position: absolute;
      margin: auto;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      width: $wheelRadius*0.95;
      height: $wheelRadius*0.95;
      border-radius: 50%;
      border: 10px solid $secondary;
      z-index: 1;
    }
    .spokes {
      position: absolute;
      margin: auto;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      width: $wheelRadius*0.65;
      height: $wheelRadius*0.65;
      border-radius: 50%;
      border-left: 3px solid transparent;
      border-right: 3px solid transparent;
      border-top: 3px solid $secondary;
      z-index: 1;
      animation: rt 2s infinite linear;
      background: rgba(200, 100, 100, 0.1);
      &:nth-of-type(3) {
        border-left: 3px solid transparent;
        border-right: 3px solid transparent;
        border-bottom: 3px solid $secondary;
      }
    }
    .hub {
      position: absolute;
      margin: auto;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      width: $wheelRadius*0.2;
      height: $wheelRadius*0.2;
      border-radius: 50%;
      background: $secondary;
    }
  }
  .back-wheel {
    left: 0;
  }
  .front-wheel {
    right: 0;
  }
  .gear {
    position: absolute;
    margin: auto;
    top: 0;
    bottom: 0;
    left: calc(#{$wheelRadius} + #{$wheelRadius*0.33});
    width: $wheelRadius*0.3;
    height: $wheelRadius*0.3;
    border-radius: 50%;
    background: $primary;
    z-index: 4;
    animation: rt 3s infinite linear;
    .gear-red {
      position: absolute;
      margin: auto;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      width: $wheelRadius*0.2;
      height: $wheelRadius*0.2;
      border-radius: 50%;
      border: 3px solid $secondary;
    }
    .pedal-tube {
      position: absolute;
      margin: auto;
      top: -30px;
      right: 0;
      bottom: 0;
      left: 0;
      transform: rotate(-90deg);
      width: $tubeWidth*0.2;
    }
    .pedal {
      position: absolute;
      margin: auto;
      top: -50px;
      right: 0;
      bottom: 0;
      left: 0;
      width: 20px;
      height: 5px;
      background: $secondary;
      border-radius: 5px;
      z-index: 3;
    }
  }
  .tube {
    position: absolute;
    margin: auto;
    top: 0;
    bottom: 0;
    height: $tubeHeight;
    border-radius: $tubeHeight;
    background: $primary;
    z-index: 3;
  }
  .chain-tube {
    left: calc(#{$wheelRadius} / 2);
    width: $tubeWidth*1.2;
  }
  .seat-tube-back {
    left: calc(#{$wheelRadius} / 2);
    transform-origin: left;
    transform: rotate(-60deg);
    width: $tubeWidth*1.2;
  }
  .seat-tube-front {
    left: calc(#{$wheelRadius} / 2);
    transform-origin: right;
    transform: rotate(60deg);
    width: $tubeWidth*1.2;
  }
  .seat-tube-post {
    left: calc((#{$wheelRadius} / 2) - 20px);
    transform-origin: right;
    transform: rotate(60deg);
    background: $secondary;
    z-index: 1;
    height: calc(#{$tubeHeight} - 1px);
    width: $tubeWidth*1.4;
  }
  .top-tube {
    left: $wheelRadius;
    bottom: initial;
    top: 44px;
    width: $tubeWidth*1.13;
  }
  .top-handlebar-tube {
    right: $wheelRadius - 8px;
    bottom: initial;
    top: 25px;
    width: $tubeWidth*0.2;
    background: $secondary;
  }
  .top-handlebar-tube2 {
    right: $wheelRadius - 30px;
    bottom: initial;
    top: 25px;
    width: $tubeWidth*0.25;
    background: $primary;
    border-radius: 0%;
  }
  .down-tube {
    left: calc(#{$wheelRadius} + #{$wheelRadius*0.5});
    width: $tubeWidth;
    transform-origin: left;
    transform: rotate(-50deg);
  }
  .head-tube {
    right: calc(#{$wheelRadius} / 2);
    transform-origin: right;
    transform: rotate(60deg);
    width: $tubeWidth*1.2;
  }
  .head-tube-post {
    right: calc(#{$wheelRadius} / 2);
    transform-origin: right;
    transform: rotate(60deg);
    width: $tubeWidth*1.4;
    background: $secondary;
    z-index: 1;
    height: calc(#{$tubeHeight} - 1px);
  }
  .saddle {
    position: absolute;
    margin: auto;
    top: 20px;
    left: $tubeWidth*0.85;
    width: $saddleWidth;
    height: $saddleHeight;
    border-top-left-radius: 50%;
    border-top-right-radius: 100%;
    border-bottom-left-radius: 50%;
    background: $primary;
    z-index: 2;
  }
  .handlebars {
    position: absolute;
    margin: auto;
    top: 25px;
    right: calc(#{$tubeWidth} / 2 + 25px);
    width: 30px;
    height: 30px;
    border-top-right-radius: 50%;
    border-bottom-right-radius: 50%;
    border-top: $tubeHeight solid $primary;
    border-right: $tubeHeight solid $primary;
    border-bottom: $tubeHeight solid $secondary;
    z-index: 2;
  }
}

.ground-container {
  position: absolute;
  margin: auto;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 600px;
  height: 200px;
  overflow: hidden;
  .ground {
    position: absolute;
    margin: auto;
    animation: mv infinite linear;
    background: $secondary;
    z-index: -1;
  }
  .ground1 {
    bottom: 0;
    right: -150px;
    width: 100px;
    height: 4px;
    border-radius: 10px;
    animation-duration: 3s;
    z-index: 5;
    &:before {
      content: "";
      position: absolute;
      margin: auto;
      top: -60px;
      left: 150px;
      width: 40px;
      height: 30px;
      border-top-right-radius: 60%;
      border-top-left-radius: 30%;
      border-bottom-left-radius: 20%;
      background: $primary;
    }
  }
  .ground2 {
    bottom: 70px;
    right: -250px;
    width: 100px;
    height: 2px;
    border-radius: 10px;
    animation-duration: 4s;
    &:before {
      content: "";
      position: absolute;
      margin: auto;
      top: -30px;
      left: 200px;
      width: 20px;
      height: 10px;
      border-top-right-radius: 60%;
      border-top-left-radius: 30%;
      border-bottom-left-radius: 20%;
      background: $primary;
    }
  }
  .ground3 {
    top: 50px;
    right: -300px;
    width: 100px;
    height: 2px;
    border-radius: 10px;
    animation-duration: 5s;
    &:before {
      content: "";
      position: absolute;
      margin: auto;
      top: 10px;
      left: -100px;
      width: 10px;
      height: 5px;
      border-top-right-radius: 60%;
      border-top-left-radius: 30%;
      border-bottom-left-radius: 20%;
      background: $primary;
    }
  }
}

@keyframes rt {
  100% {transform: rotate(360deg);}
}

@keyframes mv {
  100% {right: 900px;}
}

              
            
!

JS

              
                
              
            
!
999px

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