Coder Wrap provides free to use snippets

@import url('https://fonts.googleapis.com/css2?family=Rubik:ital,wght@0,400;0,500;0,700;0,800;1,300;1,400;1,500;1,600;1,700&display=swap');

* {
 box-sizing: border-box;
}

body {
 margin: 0px;
}

img {
 max-width: 100%;
 height: auto;
}

.slider-group *, .slider-group {
 --base-fm: 'Rubik', sans-serif;
 --bnr-cont-w: 800px;
 --sub-title: 18px;
 --title: 150px;
 --subtitle: 50px;
 --base-clr: #ffffff;
 --secound-clr: #000000;
}

.slider-group {
 width: 100%;
 position: relative;
 font-family: var(--base-fm);
 font-size: var(--sub-title);
 color: var(--base-clr);
}

.sliders {
 width: 100%;
 position: relative;
 overflow: hidden;
 text-align: center;
}

.sliders .slide {
 width: 100%;
 opacity: 0;
 transition: .3s;
 height: 0;
 position: relative;
}

.sliders .slide img {
 display: block;
}

.sliders .slide.active {
 opacity: 1;
 height: auto;
}

/**Arrows**/
.arrows-controls .arr-left, .arrows-controls .arr-right {
 position: absolute;
 top: 50%;
 z-index: 99;
 transform: translateY(-50%);
 width: 40px;
 height: 70px;
 background-color: rgba(255, 255, 255, 0.7);
 font-size: 0px;
 cursor: pointer;
}

.arrows-controls .arr-left:before, .arrows-controls .arr-right:before {
 content: '';
 position: absolute;
 width: 20px;
 height: 20px;
 border-left: #000 2px solid;
 border-bottom: #000 2px solid;
 left: 0;
 top: 50%;
 margin: -10px auto 0 auto;
 right: -12px;
}

.arrows-controls .arr-left:before {
 transform: rotate(45deg);
}

.arrows-controls .arr-left {
 left: 20px;
}

.arrows-controls .arr-right {
 right: 20px;
}

.arrows-controls .arr-right:before {
 transform: rotate(-135deg);
 right: 12px;
}

/**Arrows**/

/**Slide Content**/
.slide-cont {
 position: absolute;
 left: 0px;
 top: 50%;
 width: 100%;
 max-width: var(--bnr-cont-w);
 z-index: 88;
 transform: translateY(-50%);
 color: #fff;
 padding: 20px 60px;
 font-size: 18px;
 line-height: 1.5;
 text-align: center;
 opacity: 0;
 transition: 0.5s all;
}

.active .slide-cont {
 opacity: 1;
}

.slide-cont-inner {
 max-width: 550px;
 width: 100%;
 margin: auto;
}

.bnr-cont-right {
 left: auto;
 right: 0px;
}

.slide-cont .cmn-btn {
 background-color: #000;
 color: #fff;
 padding: 12px 40px;
 border-radius: 30px;
 text-decoration: none;
 display: inline-block;
 font-size: 18px;
}

.slide-cont h2 {
 font-size: var(--subtitle);
 line-height: normal;
 text-transform: uppercase;
 letter-spacing: 2px;
 margin: 0px 0 15px 0;
}

@media(max-width:1200px) {
 .slide-cont h2 {
  font-size: calc(var(--subtitle) - 12px);
 }

 .slide-cont {
  max-width: calc(var(--bnr-cont-w) - 150px);
 }

 .slide-cont-inner {
  max-width: 500px;
 }

 .arrows-controls .arr-left {
  left: 10px;
  width: 35px;
  height: 60px;
 }

 .arrows-controls .arr-right {
  right: 10px;
  width: 35px;
  height: 60px;
 }

 .arrows-controls .arr-left:before, .arrows-controls .arr-right:before {
  width: 14px;
  height: 14px;
  margin-top: -8px;
 }

}

@media(max-width:767px) {
 .arrows-controls .arr-left {
  left: 10px;
  width: 28px;
  height: 38px;
 }

 .arrows-controls .arr-right {
  right: 10px;
  width: 28px;
  height: 38px;
 }

 .slide-cont {
  padding: 10px 40px;
  font-size: 14px;
  line-height: 1.3;
 }

 .slide-cont h2 {
  font-size: calc(var(--subtitle) - 24px);
  margin-bottom: 5px;
 }

 .slide-cont h2 br {
  display: none;
 }

 .slide-cont p {
  margin: 5px 0px;
 }

 .slide-cont .cmn-btn {
  padding: 9px 18px;
  font-size: 14px;
 }

}

function Slider() {
  let items= document.querySelectorAll('.slide')
  let i = 0;
  function sliderItemNext() {
   i++
   if (items.length -1 < i) {
       i = 0
   }
   items.forEach(item => {
       item.classList.remove('active')
   })
   items[i].classList.add('active') 
  }
   function sliderItemPrev() {
    i--
    if (items.length - 1 < i || i < 0) {
        i = items.length - 1
    }
    items.forEach(item => {
        item.classList.remove('active')
    })
    items[i].classList.add('active') 
  }
  
  setInterval(function () {
   sliderItemNext();
},5000);
  document.getElementById("slideNext").addEventListener("click", function(){
   sliderItemNext(); 
  });
  document.getElementById("slidePrev").addEventListener("click", function(){
   sliderItemPrev(); 
  });
}
Slider()