.circle {
  position: relative;
  border: 1px solid black;
  padding: 0;
  margin: 1em auto;
  width: 30em;
  height: 30em;
  border-radius: 50%;
  list-style: none;
  overflow: hidden;
}
.circle li {
  overflow: hidden;
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 50%;
  transform-origin: 0% 100%;
}
.circle .text {
  position: absolute;
  left: -100%;
  width: 200%;
  height: 200%;
  text-align: center;
  transform: skewY(30deg) rotate(30deg);
  padding-top: 20px;
}
.circle li:first-child {
  transform: rotate(0deg) skewY(-30deg);
}
.circle li:nth-child(2) {
  transform: rotate(60deg) skewY(-30deg);
}
.circle li:nth-child(3) {
  transform: rotate(120deg) skewY(-30deg);
}
.circle li:nth-child(4) {
  transform: rotate(180deg) skewY(-30deg);
}
.circle li:nth-child(5) {
  transform: rotate(240deg) skewY(-30deg);
}
.circle li:nth-child(6) {
  transform: rotate(300deg) skewY(-30deg);
}

li:first-child .text {
  background: white;
}
li:nth-child(2) .text {
  background: grey;
}
li:nth-child(3) .text {
  background: white;
}
li:nth-child(4) .text {
  background: grey;
}
li:nth-child(5) .text {
  background: white;
}
li:nth-child(6) .text {
  background: grey;
}


.circle2 {
  position: relative;
  border: 1px solid black;
  padding: 0;
  top: -30em;
  margin: 5em auto;
  width: 20em;
  height: 20em;
  border-radius: 50%;
  list-style: none;
  overflow: hidden;
}
.circle2 li {
  overflow: hidden;
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 50%;
  transform-origin: 0% 100%;
}
.circle2 .text {
  position: absolute;
  left: -100%;
  width: 200%;
  height: 200%;
  text-align: center;
  transform: skewY(30deg) rotate(30deg);
  padding-top: 20px;
}
.circle2 li:first-child {
  transform: rotate(0deg) skewY(-30deg);
}
.circle2 li:nth-child(2) {
  transform: rotate(60deg) skewY(-30deg);
}
.circle2 li:nth-child(3) {
  transform: rotate(120deg) skewY(-30deg);
}
.circle2 li:nth-child(4) {
  transform: rotate(180deg) skewY(-30deg);
}
.circle2 li:nth-child(5) {
  transform: rotate(240deg) skewY(-30deg);
}
.circle2 li:nth-child(6) {
  transform: rotate(300deg) skewY(-30deg);
}

.circle2 li:first-child .text {
  background: grey;
}
.circle2 li:nth-child(2) .text {
  background: white;
}
.circle2 li:nth-child(3) .text {
  background: grey;
}
.circle2 li:nth-child(4) .text {
  background: white;
}
.circle2 li:nth-child(5) .text {
  background: grey;
}
.circle2 li:nth-child(6) .text {
  background: white;
}


.circle3 {
  position: relative;
/*  border: 1px solid black;*/
  padding: 0;
  top: -50em;
  right: 0em;
  margin: 7.5em auto;
  width: 5em;
  height: 5em;
  border-radius: 50%;
  list-style: none;
  overflow: hidden;
}
.circle3 li {
  overflow: hidden;
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 50%;
  transform-origin: 0% 100%;
}
.circle3 .text {
  position: absolute;
  left: -100%;
  width: 200%;
  height: 200%;
  text-align: center;
  transform: skewY(-30deg) rotate(60deg);
  padding-top: 10px;
}
.circle3 li:first-child {
  transform: rotate(0deg) skewY(30deg);
}
.circle3 li:nth-child(2) {
  transform: rotate(120deg) skewY(30deg);
}
.circle3 li:nth-child(3) {
  transform: rotate(240deg) skewY(30deg);
}

.circle3 li:first-child .text {
  background: #EEEEEE;
}
.circle3 li:nth-child(2) .text {
  background: #CCCCCC;
}
.circle3 li:nth-child(3) .text {
  background: #AAAAAA;
}

ul li div{
  -webkit-transition: all 1s ease-in-out;
  -moz-transition: all 1s ease-in-out;
  -o-transition: all 1s ease-in-out;
  -ms-transition: all 1s ease-in-out;
  transition: all 1s ease-in-out;
}