* {
    box-sizing: border-box;
  }
  
  .box {
    float: left;
    width: 33.33%;
    padding: 5px;
  }

  .box2 {
    float:left;
    width: 50%;
    padding: 10px;
  }

 
  
  .clearfix::after {
    content: "";
    clear: both;
    display: table;
  }

  ul {
    list-style-type:none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
  }
  
  li {
    float: left;
  }
  
  li a {
    display: inline-block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
  }
  
  li a:hover {
    background-color:red;
  }
  
body {
  background-color:lightblue;
  
}

p {
  color:blue;
  font-size: 20px;
  font-family:Arial, Helvetica, sans-serif;
}

h1 {
  background-color: azure;
  text-align: center;
  padding: 20px;
}

#bulb {
background-color: azure;
text-align: center;

}

button {
  font-size: 30px;
  padding: 15px 32px;
}