p, span{
  font-size: 1em;
  
}

.p1{
  background-color: lightblue;
  width:400px;
  height:100px;
}

.p2{
  background-color: lightgreen;
  
}

.s1{
  background-color: orange;
  width:400px;
  height:100px;
}
.s2{
  background-color: yellow;
  
}