#box_1 { 
	position: absolute;
	top: 0;
	left: 0;
	width: 200px;
	height: 200px;
	background: #ee3e64;
}
#box_2 { 
	position: absolute;
	top: 0;
	right: 0;
	width: 200px;
	height: 200px;
	background: #44accf;
}
#box_3 { 
	position: absolute;
	bottom: 0;
	left: 0;
	width: 200px;
	height: 200px;
	background: #b7d84b;
}
#box_4 { 
	position: absolute;
	bottom: 0;
	right: 0;
	width: 200px;
	height: 200px;
	background: #ebde52;
}
/* ---------- Botones ---------------- */
.next {
    border-radius: 200px 200px 200px 200px;
    border: 5px rgb(232,78,26) solid;
    margin-left: 50%;
    text-decoration: none;
    color: white;
    font-family: sans-serif;
    font-size: 20px;
    background-color: rgb(232,78,26);
    box-shadow: 2px 2px 2px black;
}
.next:hover{
    background-color: darkred;
    border: 5px darkred solid;
}