* {
  margin: 0px;
  padding: 0px;
}
#main {
  width: 800px;
  height: 600px;
  border: 1px solid black;
  margin: 50px auto;
}
#right {
  width: 50%;
  height: 600px;
  background-color: blueviolet;
  float: right;
}
#left {
  width: 50%;
  height: 600px;
  background-color: hotpink;
  float: left;
}
