body{
margin:0px;
}

div{
width:250px;
height:100px;
border: 5px solid #000000;
color: black;
font-weight: bold;
margin:25px;
}

div#d1{
float: left;
background-color:red;
}

div#d2{
float: left;
background-color:green;
}

div#d3{
float: left;
background-color:blue;
}

div#d4{
float: right;
background-color:blueviolet;
}