body {
  margin: 0;
  padding: 0;
  background-color: #222;
}

.wrapper,
.wrapper2,
.wrapper3 {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  box-sizing: border-box;
}

.wrapper {
  z-index: 3
}

.wrapper2 {
  z-index: 2
}

.wrapper3 {
  z-index: 1
}

.row {
  display: flex;
  justify-content: center;
  align-items: center;
}

.circ {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  margin: 10px;
  border-radius: 500px;
  background: aqua;
}

.circ2 {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  margin: 10px;
  border-radius: 500px;
  background: blue;
}

.circ3 {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  margin: 10px;
  border-radius: 500px;
  background: #00ff95;
}