Ticker doesn't loop straight away at end

Question

Code is below - I'm trying to get this to loop smoothly from the last headline - currently there is a gap and I can't figure out how to loop the headlines without it :/. The current functionality is good, but the gap at the end of the 4 headlines (NB - eventually there will be many more headlines) is really bugging me. Any help would be awesome

    <style>
.box{
width: 80%;
}
* {
  box-sizing: border-box;
}

@-webkit-keyframes ticker {
  0% {
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
    visibility: visible;
  }
  100% {
    -webkit-transform: translate3d(-100%, 0, 0);
    transform: translate3d(-100%, 0, 0);
  }
}
@keyframes ticker {
  0% {
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
    visibility: visible;
  }
  100% {
    -webkit-transform: translate3d(-100%, 0, 0);
    transform: translate3d(-100%, 0, 0);
  }
}
.ticker-wrap {
  position: relative;
  left: 0;
  width: 100%;
  overflow: hidden;
  height: 3rem;
  background-color: #000;
  box-sizing: content-box;
}
.ticker-wrap .ticker {
  display: inline-block;
  height: 3rem;
  line-height: 3rem;
  white-space: nowrap;
  padding-right: 10%;
  box-sizing: content-box;
  -webkit-animation-iteration-count: infinite;
  animation-iteration-count: infinite;
  -webkit-animation-timing-function: linear;
  animation-timing-function: linear;
  -webkit-animation-name: ticker;
  animation-name: ticker;
  -webkit-animation-duration: 25s;
  animation-duration: 25s;
}
.ticker-wrap .ticker__item {
  display: inline-block;
  padding: 0 2rem;
  font-size: 2rem;
  color: white;
}
</style>
        

<div class="rt-container">
<div class="col-rt-12">
<div class="Scriptcontent">
<div class="ticker-wrap">
<div class="ticker">
              <div class="ticker__item"><h2></h2></div>
              <div class="ticker__item"><h2>Massi out in FIA Race Director Shake-up</h2></div>
              <div class="ticker__item"></div><div class="ticker__item"><h2>Ferrari Unveil Bold Design For 2022 Car.</h2></div>
              <div class="ticker__item"></div><div class="ticker__item"><h2>Sprint Races Cut From 6 to 3 Due to Cost Cap Dispute.</h2></div>
              <div class="ticker__item"></div><div class="ticker__item"><h2>Szafnauer named Alpine Team Principal as Rossi confirms new structure.</h2></div>
</div>
</div>
</div>
</div>
</div>