h1 {
  /* selector(tagname) (
  property: value;
  property: value;
}
*/
  color:blue;
  font-size: 3em;
  text-decoration: underline;
  font-family:"Impact"; 
    padding: 2em;
  margin: 1em;
}

h2 {color:red;}
h3 {color:yellow}    

h3 {
  background-color: Green;
  padding: 3em;
  margin: 2em
}
h2 {
  background-color: blue;
  Margin: 1em;
    padding: 1em;
   
}
h1 {
  background-color: red;
}
a {
  font-size: 3em;
  font-family: Monospace;
  Background-color: violet;
     
}
ul {
  font-size: 2em;
  font-family: Trebuchet MS;
  Background-color: Pink;
    color: Red; 
       padding: 2em;
    Margin: 1em;
  Text-decoration: Underline magenta 5px
}
ol {
  font-size: 2em;
  font-family: Fantasy;
  color: orange;
    Background-color:cyan;
  padding: 2em;
    Margin: 1em;
  Text-decoration: Underline yellow 8px
  }
h4 {
   Background-color: Gold;
  Color: blue;
  font-family: Trebuchet MS;
  font-size: 20px;
    padding: 3em;
    Margin: 1em;
   Text-decoration: Underline green wavy 6px;