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HTML 

              
                <div class="game"></div>
!

CSS 

              
                /* colors */
$white: #FFFFFF;

$gray: #D9D9D9;

$yellow: #CAC65D;
$red: #CA5D5D;
$blue: #5D75CA;
$green: #60CA5D;

$light-blue1: #DEF9F1;
$light-blue2: #C1EFE1;

/*dimensions */
$full: 100vh;

/* Presets */

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

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 1;
  perspective-origin: 25% 75%;
  background: linear-gradient(187.47deg, $light-blue1 15%, $light-blue2 100%);
  perspective: 700px;
  perspective-origin: 50% 50%;
}

div:before, div:after {
  display: block;
  content: '';
  position: absolute;
}

div.game {
    width: 100vw;
    height: 100vh;
    margin-top: -30vh;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    transform: rotateX(15deg);
    background:
      
    /* cable */ linear-gradient(90deg, darken($gray, 35%) 0vh, darken($gray, 65%) 100vh, transparent 3vh) 57.5vh 0vh / 1.5vh 50vh no-repeat,    /* cable-stop */ linear-gradient( darken($gray, 35%) 10vh, darken($gray, 35%) 10vh, transparent 3vh) 53vh 48vh / 11vh 2vh no-repeat,

    /* atop */ linear-gradient( darken($gray, 5%) 10vh, darken($gray, 5%) 10vh, transparent 3vh) 51vh 52vh / 15vh 7vh no-repeat,
      
     /* LEFT SIDE */ 
      
    /* up-tri-l */ linear-gradient(-55deg, darken($white, 20%), 0.75vh, transparent 0.75vh) 38.5vh 57vh / 1.5vh 1.5vh no-repeat,
    /* up-tri-r */ linear-gradient(55deg, darken($white, 20%), 0.75vh, transparent 0.75vh) 40vh 57vh / 1.5vh 1.5vh no-repeat,
    /* up */ linear-gradient( darken($gray, 65%) 10vh, darken($gray, 65%) 10vh, transparent 3vh) 37.5vh 56vh / 5vh 7vh no-repeat,

    /* down-tri-l */ linear-gradient(-125deg, darken($white, 20%), 0.75vh, transparent 0.75vh) 38.5vh 67vh / 1.5vh 1.5vh no-repeat,
    /* down-tri-r */ linear-gradient(125deg, darken($white, 20%), 0.75vh, transparent 0.75vh) 40vh 67vh / 1.5vh 1.5vh no-repeat,
    /* down */ linear-gradient( darken($gray, 65%) 10vh, darken($gray, 65%) 10vh, transparent 3vh) 37.5vh 63vh / 5vh 7vh no-repeat,
      
    /* depth-b */ linear-gradient(-115deg, darken($gray, 85%) 1vh, transparent 1vh) 37.5vh 69.75vh / 1vh 1vh no-repeat,
    /* depth-b */ linear-gradient(115deg, darken($gray, 70%) 1vh, transparent 1vh) 41.5vh 69.75vh / 1vh 1vh no-repeat,
    /* depth-b */ linear-gradient( darken($gray, 70%) 10vh, darken($gray, 70%) 10vh, transparent 3vh) 38vh 69.75vh / 4vh 1vh no-repeat,
      
      
      
    /* left-tri-l */ linear-gradient(-145deg, darken($white, 20%), 0.75vh, transparent 0.75vh) 34vh 62.25vh / 1.5vh 1.5vh no-repeat,
    /* left-tri-r */ linear-gradient(-35deg, darken($white, 20%), 0.75vh, transparent 0.75vh) 34vh 60.75vh / 1.5vh 1.5vh no-repeat,
    /* left */ linear-gradient( darken($gray, 65%) 10vh, darken($gray, 65%) 10vh, transparent 3vh) 33vh 60vh / 7vh 5vh no-repeat,
    /* left */ linear-gradient(-115deg, darken($gray, 85%) 1vh, transparent 1vh) 33.1vh 64.75vh / 1vh 1vh no-repeat,
    /* left */ linear-gradient( darken($gray, 70%) 10vh, darken($gray, 70%) 10vh, transparent 3vh) 34vh 63.75vh / 8vh 2vh no-repeat,
      
    /* right-tri-l */ linear-gradient(145deg, darken($white, 20%), 0.75vh, transparent 0.75vh) 44.5vh 62.25vh / 1.5vh 1.5vh no-repeat,
    /* right-tri-r */ linear-gradient(35deg, darken($white, 20%), 0.75vh, transparent 0.75vh) 44.5vh 60.75vh / 1.5vh 1.5vh no-repeat,
    /* right */ linear-gradient( darken($gray, 65%) 10vh, darken($gray, 65%) 10vh, transparent 3vh) 40vh 60vh / 7vh 5vh no-repeat,
    /* depth-r */ linear-gradient(115deg, darken($gray, 70%) 1vh, transparent 1vh) 46vh 64.75vh / 1vh 1vh no-repeat,
    /* depth-r */ linear-gradient( darken($gray, 70%) 10vh, darken($gray, 70%) 10vh, transparent 3vh) 40vh 63.75vh / 6vh 2vh no-repeat,

    /* l */radial-gradient(circle, $white 10vh, transparent 10vh)  15vh 38vh / 50vh 50vh no-repeat,
    /* l */radial-gradient(circle, $gray 13vh, transparent 13vh)  15vh 38vh / 50vh 50vh no-repeat,
      
      
     /* RIGHT SIDE */ 
      
    /* red */radial-gradient(circle, $red 2.5vh, transparent 2.5vh) 80vh 60vh / 5vh 5vh no-repeat,
    /* red */radial-gradient(circle, darken($red, 15%) 2.5vh, transparent 2.5vh) 80vh 60.5vh / 5vh 5vh no-repeat,
    /* green */radial-gradient(circle, $green 2.5vh, transparent 2.5vh) 75vh 65vh / 5vh 5vh no-repeat,
    /* green */radial-gradient(circle, darken($green, 15%) 2.5vh, transparent 2.5vh) 75vh 65.5vh / 5vh 5vh no-repeat,
    /* blue */radial-gradient(circle, $blue 2.5vh, transparent 2.5vh) 70vh 60vh / 5vh 5vh no-repeat,
    /* depth-blue */radial-gradient(circle, darken($blue, 15%) 2.5vh, transparent 2.5vh) 70vh 60.5vh / 5vh 5vh no-repeat,
    /* yellow */radial-gradient(circle, $yellow 2.5vh, transparent 2.5vh) 75vh 55vh / 5vh 5vh no-repeat,
    /* depth-yellow */radial-gradient(circle, darken($yellow, 15%) 2.5vh, transparent 2.5vh) 75vh 55.5vh / 5vh 5vh no-repeat,
      
    /* r */radial-gradient(circle, $white 10vh, transparent 10vh) 52vh 38vh / 50vh 50vh no-repeat,
    /* r */radial-gradient(circle, $gray 13vh, transparent 13vh) 52vh 38vh / 50vh 50vh no-repeat,
      
      
      
     /* CENTER SIDE */ 

    /* select */radial-gradient(ellipse, darken($gray, 45%) 2vh, transparent 2vh) 55vh 60vh / 3vh 5vh no-repeat,
    /* select */radial-gradient(ellipse, darken($gray, 55%) 2vh, transparent 2vh) 55vh 60.75vh / 3vh 5vh no-repeat,
      
    /* start */radial-gradient(ellipse, darken($gray, 45%) 2vh, transparent 2vh) 59vh 60vh / 3vh 5vh no-repeat,
    /* start */radial-gradient(ellipse, darken($gray, 55%) 2vh, transparent 2vh) 59vh 60.75vh / 3vh 5vh no-repeat,
      
      
    /* base */ linear-gradient( $gray 30vh, $gray 30vh, transparent 3vh) 38vh 50vh / 40vh 17vh no-repeat,
  
  
     /* CENTER SIDE */ 

    /* yellow */radial-gradient(ellipse, darken($gray, 45%) 2vh, transparent 2vh) 55vh 60vh / 3vh 5vh no-repeat,
    /* yellow */radial-gradient(ellipse, darken($gray, 45%) 2vh, transparent 2vh) 59vh 60vh / 3vh 5vh no-repeat,
      
      
      
     /* DEPTH SIDE */ 
      
    /* base */ linear-gradient( darken($gray, 10%)  30vh, darken($gray, 10%) 30vh, transparent 3vh) 50vh 63vh / 15vh 7vh no-repeat,
    /* depth-l */radial-gradient(circle, darken($gray, 10%) 13vh, transparent 13vh) 14.5vh 41vh / 52vh 50vh no-repeat,
    /* depth-r */radial-gradient(circle, darken($gray, 10%) 13vh, transparent 13vh) 50.5vh 41vh / 52vh 50vh no-repeat;
}
!

JS 

              
                /* This entry was an attempt at trying to do something simple but polished, a respite from some of the complex versions I have been working on the first week of divtober. Still couldn't help trying to figure out perspective again.  There is a time-lapse video of making this piece at https://youtu.be/88fKEUnMgNs */
!
999px

Console