Demo for Slider with Overlay Transition Effect

Preview
Source Code
                            <!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<!-- This script got from www.devanswer.com -->


<style>
@import url("https://fonts.googleapis.com/css?family=Heebo:400,700,800");
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.parent {
  width: 681px;
  height: 384px;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto auto;
  overflow: hidden;
  position: absolute;
  -webkit-box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);
  -moz-box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);
  box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);
}

svg {
  position: absolute;
  z-index: 1;
  width: 681px;
  height: 384px;
}

button {
  position: absolute;
  z-index: 50;
  width: 40px;
  overflow: hidden;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  -webkit-box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);
  -moz-box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);
  box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);
}
button:focus {
  outline-width: 0;
}

circle {
  stroke: #fff;
  fill: none;
  transition: 0.3s;
}

#svg1 circle {
  transition-timing-function: linear;
}

#svg2 circle {
  transition-timing-function: linear;
}

#Capa_1 {
  position: absolute;
  width: 16px;
  height: 16px;
  transform: translate(-7px, -8px);
}

#Capa_2 {
  position: absolute;
  width: 16px;
  height: 16px;
  transform: translate(-9px, -8px);
}

.right {
  margin-left: 628px;
  margin-top: 168px;
  border: 1px solid #849494;
  background-color: transparent;
  transition: .5s;
}
.right:hover {
  background-color: #fff;
}

.left {
  margin-left: 0.5%;
  margin-top: 6.17%;
  border: 1px solid #849494;
  background-color: transparent;
  transition: .5s;
}
.left:hover {
  background-color: #fff;
}

.circle1 {
  transition-delay: 0.05s;
}

.circle2 {
  transition-delay: 0.1s;
}

.circle3 {
  transition-delay: 0.15s;
}

.circle4 {
  transition-delay: 0.2s;
}

.circle5 {
  transition-delay: 0.25s;
}

.circle6 {
  transition-delay: 0.3s;
}

.circle7 {
  transition-delay: 0.35s;
}

.circle8 {
  transition-delay: 0.4s;
}

.circle9 {
  transition-delay: 0.45s;
}

.circle10 {
  transition-delay: 0.05s;
}

.circle11 {
  transition-delay: 0.1s;
}

.circle12 {
  transition-delay: 0.15s;
}

.circle13 {
  transition-delay: 0.2s;
}

.circle14 {
  transition-delay: 0.25s;
}

.circle15 {
  transition-delay: 0.3s;
}

.circle16 {
  transition-delay: 0.35s;
}

.circle17 {
  transition-delay: 0.4s;
}

.circle18 {
  transition-delay: 0.45s;
}

.slide1 {
  background-image: url("http://devanswer.com/codes/files/slider-w.jpg");
}

.slide2 {
  background-image: url("http://devanswer.com/codes/files/slider-x.jpg");
}

.slide3 {
  background-image: url("http://devanswer.com/codes/files/slider-y.jpg");
}

.slide4 {
  background-image: url("http://devanswer.com/codes/files/slider-z.jpg");
}

.slider {
  position: absolute;
  width: 400%;
  height: 100%;
  background: #000;
  display: inline-flex;
  overflow: hidden;
}

.slide1, .slide2, .slide3, .slide4 {
  position: absolute;
  background-position: center;
  background-size: cover;
  color: #fff;
  font-size: 62px;
  padding-top: 138px;
  font-weight: 800;
  font-family: 'Heebo', sans-serif;
  text-align: center;
  width: 25%;
  height: 100%;
  z-index: 10;
  transition: 1.4s;
}

.tran {
  transform: scale(1.3);
}

.up1 {
  z-index: 20;
}

.up2 {
  z-index: 40;
}

.steap {
  stroke-width: 0;
}

.streak {
  stroke-width: 82px;
}

@media (max-width: 700px) {
  .parent {
    margin-left: 1%;
  }
}
</style>

</head>
<body>
<div class='parent'>
  <div class='slider'>
   <button type="button" id='right' class='right' name="button">

       <svg version="1.1" id="Capa_1" width='40px' height='40px ' xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
         viewBox="0 0 477.175 477.175" style="enable-background:new 0 0 477.175 477.175;" xml:space="preserve">
       <g>
        <path style='fill: #9d9d9d;' d="M360.731,229.075l-225.1-225.1c-5.3-5.3-13.8-5.3-19.1,0s-5.3,13.8,0,19.1l215.5,215.5l-215.5,215.5
          c-5.3,5.3-5.3,13.8,0,19.1c2.6,2.6,6.1,4,9.5,4c3.4,0,6.9-1.3,9.5-4l225.1-225.1C365.931,242.875,365.931,234.275,360.731,229.075z
          "/>
       </g>

       </svg>

       </button>
   <button type="button" id='left' class='left' name="button">
       <svg version="1.1" id="Capa_2" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
         viewBox="0 0 477.175 477.175" style="enable-background:new 0 0 477.175 477.175;" xml:space="preserve">
       <g>
        <path style='fill: #9d9d9d;' d="M145.188,238.575l215.5-215.5c5.3-5.3,5.3-13.8,0-19.1s-13.8-5.3-19.1,0l-225.1,225.1c-5.3,5.3-5.3,13.8,0,19.1l225.1,225
          c2.6,2.6,6.1,4,9.5,4s6.9-1.3,9.5-4c5.3-5.3,5.3-13.8,0-19.1L145.188,238.575z"/>
       </g>
       </svg>
       </button>
   <svg id='svg2' class='up2' xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
      <circle id='circle1' class='circle1 steap' cx="34px" cy="49%" r="20"  />
      <circle id='circle2' class='circle2 steap' cx="34px" cy="49%" r="100"  />
      <circle id='circle3' class='circle3 steap' cx="34px" cy="49%" r="180"  />
      <circle id='circle4' class='circle4 steap' cx="34px" cy="49%" r="260"  />
      <circle id='circle5' class='circle5 steap' cx="34px" cy="49%" r="340"  />
      <circle id='circle6' class='circle6 steap' cx="34px" cy="49%" r="420"  />
      <circle id='circle7' class='circle7 steap' cx="34px" cy="49%" r="500"  />
      <circle id='circle8' class='circle8 steap' cx="34px" cy="49%" r="580"  />
      <circle id='circle9' class='circle9 steap' cx="34px" cy="49%" r="660"  />
    </svg>
   <svg id='svg1' class='up2' xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
      <circle id='circle10' class='circle10 steap' cx="648px" cy="49%" r="20"  />
      <circle id='circle11' class='circle11 steap' cx="648px" cy="49%" r="100"  />
      <circle id='circle12' class='circle12 steap' cx="648px" cy="49%" r="180"  />
      <circle id='circle13' class='circle13 steap' cx="648px" cy="49%" r="260"  />
      <circle id='circle14' class='circle14 steap' cx="648px" cy="49%" r="340"  />
      <circle id='circle15' class='circle15 steap' cx="648px" cy="49%" r="420"  />
      <circle id='circle16' class='circle16 steap' cx="648px" cy="49%" r="500"  />
      <circle id='circle17' class='circle17 steap' cx="648px" cy="49%" r="580"  />
      <circle id='circle18' class='circle18 steap' cx="648px" cy="49%" r="660"  />
    </svg>
   <div id='slide1' class='slide1 up1'>MOUNTAIN</div>
   <div id='slide2' class='slide2'>BEACH</div>
   <div id='slide3' class='slide3'>FOREST</div>
   <div id='slide4' class='slide4'>DESERT</div>
  </div>
 </div><div id="bcl"><a style="font-size:8pt;text-decoration:none;" href="http://www.devanswer.com">Developers Answer</a></div>
<script>
var curpage = 1;
var sliding = false;
var click = true;
var left = document.getElementById("left");
var right = document.getElementById("right");
var pagePrefix = "slide";
var pageShift = 500;
var transitionPrefix = "circle";
var svg = true;

function leftSlide() {
	if (click) {
		if (curpage == 1) curpage = 5;
		console.log("woek");
		sliding = true;
		curpage--;
		svg = true;
		click = false;
		for (k = 1; k <= 4; k++) {
			var a1 = document.getElementById(pagePrefix + k);
			a1.className += " tran";
		}
		setTimeout(() => {
			move();
		}, 200);
		setTimeout(() => {
			for (k = 1; k <= 4; k++) {
				var a1 = document.getElementById(pagePrefix + k);
				a1.classList.remove("tran");
			}
		}, 1400);
	}
}

function rightSlide() {
	if (click) {
		if (curpage == 4) curpage = 0;
		console.log("woek");
		sliding = true;
		curpage++;
		svg = false;
		click = false;
		for (k = 1; k <= 4; k++) {
			var a1 = document.getElementById(pagePrefix + k);
			a1.className += " tran";
		}
		setTimeout(() => {
			move();
		}, 200);
		setTimeout(() => {
			for (k = 1; k <= 4; k++) {
				var a1 = document.getElementById(pagePrefix + k);
				a1.classList.remove("tran");
			}
		}, 1400);
	}
}

function move() {
	if (sliding) {
		sliding = false;
		if (svg) {
			for (j = 1; j <= 9; j++) {
				var c = document.getElementById(transitionPrefix + j);
				c.classList.remove("steap");
				c.setAttribute("class", transitionPrefix + j + " streak");
				console.log("streak");
			}
		} else {
			for (j = 10; j <= 18; j++) {
				var c = document.getElementById(transitionPrefix + j);
				c.classList.remove("steap");
				c.setAttribute("class", transitionPrefix + j + " streak");
				console.log("streak");
			}
		}

		// for(k=1;k<=4;k++){
		//   var a1 = document.getElementById(pagePrefix + k);
		//   a1.className += ' tran';
		// }

		setTimeout(() => {
			for (i = 1; i <= 4; i++) {
				if (i == curpage) {
					var a = document.getElementById(pagePrefix + i);
					a.className += " up1";
				} else {
					var b = document.getElementById(pagePrefix + i);
					b.classList.remove("up1");
				}
			}
			sliding = true;
		}, 600);
		setTimeout(() => {
			click = true;
		}, 1700);

		setTimeout(() => {
			if (svg) {
				for (j = 1; j <= 9; j++) {
					var c = document.getElementById(transitionPrefix + j);
					c.classList.remove("streak");
					c.setAttribute("class", transitionPrefix + j + " steap");
				}
			} else {
				for (j = 10; j <= 18; j++) {
					var c = document.getElementById(transitionPrefix + j);
					c.classList.remove("streak");
					c.setAttribute("class", transitionPrefix + j + " steap");
				}
				sliding = true;
			}
		}, 850);
		setTimeout(() => {
			click = true;
		}, 1700);
	}
}

left.onmousedown = () => {
	leftSlide();
};

right.onmousedown = () => {
	rightSlide();
};

document.onkeydown = e => {
	if (e.keyCode == 37) {
		leftSlide();
	} else if (e.keyCode == 39) {
		rightSlide();
	}
};

//for codepen header
setTimeout(() => {
	rightSlide();
}, 500);
</script>

</body>
</html>
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