#stomach {
    width: 35%;
    display: block;
    margin-left: auto;
    margin-right: auto;
    float: right;
    margin: 5px;
    padding: 20px;
  height: 400px;
}
#food {
    width: 40%;
    display: block;
    margin-left: auto;
    margin-right: auto;
    float: left;
    margin: 5px;
    padding: 20px;
    height: 350px;
}
#lab {
    width: 35%;
    display: block;
    margin-left: auto;
    margin-right: auto;
  float: right;
    height: 300px;
 
    
}


#glass {
    width: 35%;
    display: block;
    margin-left: auto;
    margin-right: auto;
    height: 300px;
}
body {
    background-color: lightgray;
    font-size: x-large;
    margin-left: 50px;
    margin-right: 50px;
  
    height: 100vh;
  
}