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              - roadStrips = 40              #this needs to match the SASS

- ( 1..roadStrips ).each do |i|
    %div{:class => "roadStrip roadStrip--#{i}"}
            
          
!
            
              $roadStrips:          40;        //this needs to match the HAML
$roadStripWidth:        100vw;
$roadStripDim:        6rem;

$animDuration:       12s;
$animDelayInterval:     $animDuration / $roadStrips;

//the points on the Z axis where the road starts and ends
$startZ:         7rem;
$endZ:           -50rem;

html, body {
    height: 100%;
    background: darken( darkBlue, 13% );
}

//setup 3D instance
body {
    perspective: 10rem;
    perspective-origin: 50% 0%;
    display: flex;
    justify-content: center;
}

//the containers (the blue strips)
.roadStrip {
    width: $roadStripWidth;
    
    //the background highlights each end, to make it clearer what's going on
    background: red;
    position: absolute;
    bottom: $roadStripDim;
    height: $roadStripDim;
    animation: $animDuration infinite normal anim-roadStrip linear;
    z-index: 0;
    //transform-origin: center;
}

//animation delay on each roadStrip
@for $i from 1 through $roadStrips {
    .roadStrip--#{$i} {
        animation-delay: -$animDelayInterval * $i;
    }
}

//keyframes for container
@keyframes anim-roadStrip {
    0% {
        transform: translateZ( $startZ ) rotate(30deg);
        //opacity: 0;
        z-index: 1000;
        background: blue;
    }
    
    30% {
        opacity: 1;
        background: red;
    }
    
    50% {
        opacity: 1;
        background: yellow;
    }
    
    100% {
        transform: translateZ( $endZ ) rotate( -250deg);
        opacity: 0;
        z-index: 0;
        background: red;
    }
}
            
          
!
999px
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