#contenedor1{
    display: flex;
    flex-wrap: wrap;
    align-content: center;
    background-color: #000;  
    height: 400px;
    color:white;
    font-size:2rem;
  }
  
  .item {
    background-color: #0078A6;
    width:150px;
    height:150px;
  }