.container {
  /* activate flexbox*/
  
  display: flex;
  flex-flow: row wrap;
  
  justify-content: space-around;
  }
 
  
  img {
    width: 300px;
    height: 250px;
    
    text-align: center;
    transition: width 5s;
    }
    /*
    img:active {
      width: 50%;
      
      }
  */
  
  .h2 {
    text-align: center;
    font-size: 2em;
    color: gray;
    margin-top: 150px;
    
    }