estilos.css

html{
	position: relative;
	display:block;
	overflow:none;
	margin: 0px;
	padding:0px;
}
body{
	margin: 0;
	background: #333;
	display: inline-flex;
	height: 100vh;
	min-height: 90vh;
	width: 100%;
}
.contenedor{
	margin: auto;
	perspective: 700px;
}
.cubo{
	width: 200px;
	height: 200px;
	position: relative;
	transform-style: preserve-3d;
	animation: girar 5s infinite linear;
}

@keyframes girar {
  from {
    transform: rotateY(0deg) rotateX(0deg);
  }
  
  to {
    transform: rotateY(360deg) rotateX(360deg);
  }
}


.cara {
	position: absolute;
	width: 100%;
	height: 100%;
}
.cara .p{
	top: 2px;
	left: 2px;
	position: relative;
	display: inline-block;
	border: 1px solid black;
	width: 66.6666666667px;
	height: 66.6666666667px;
	margin: -2.6px;
	padding: 0px;
}
#uno{
	background: crimson;
	transform: translateZ(100px);
}
#dos{
	background: darkorange;
	transform: translateX(100px) rotateY(90deg);
}
#tres{
	background: yellow;
	transform: translateZ(-100px);
}
#cuatro{
	background: blue;
	transform: translateX(-100px) rotateY(90deg);
}
#cinco{
	background: green;
	transform: translateY(-100px) rotateX(90deg);
}
#seis{
	background: white;
	transform: translateY(100px) rotateX(90deg);
}