Try it Editor: Styling Forms

Edit This Code :

<!DOCTYPE html>
<html>
<head>
<style>
input[type=text] {
    width: 150px;
    display: block;
    margin-bottom: 10px;
    background-color: yellow;
}

input[type=button] {
    width: 120px;
    margin-left: 35px;
    display: block;
}
</style>
</head>
<body>

<form name="input" action="" method="get">
  Firstname:<input type="text" name="Name" value="Peter" size="20">
  Lastname:<input type="text" name="Name" value="Griffin" size="20">
  <input type="button" value="Example Button">
</form>

</body>
</html>
Result :