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                <div class="container">
  <div class="row">
    <div class="col-xs-12 primeira hidden-sm">
      <p>Ao colocar a classe "hidden-sm" automaticamente escondemos este elemento para o tamanho "sm" que vai de 768px a 991px.</p>
      <p>Aumente e diminua seu navegador para ver as alterações</p>
    <div class="col-xs-12 segunda hidden-lg">
      <p>Este elemento possui a classe "hidden-lg".</p>
      <p>Esta classe o esconde apenas quando o viewport for maior ou igual a 1200px. </p>
    <div class="col-xs-12 terceira hidden-md">
      <p>Ao adicionar a classe "hidden-md", esconderemos este elemento para os tamanhos entre 992px até 1199px</p>
    <div class="col-xs-12 quarta visible-xs visible-md">
      <p>Agora usamos duas classes. Isto é porque este elemento aparece para o tamanho "xs" (0 a 767px) e para o tamanho "md" (992px a 1199px)</p>
      <p>Ele será invisível para os tamanhos "sm" (768px a 991px) e "lg" (maior ou igual a 1200px)</p>


  padding: 10px;
  margin-bottom: 10px;
  color: #FFF
    background: #0000B3;
  background: #005858;
  background: #E46C00;
  background: #EF0000;