h1{background-color: lightblue;}
#p3{color: green;}
a{background-color: lightblue; border: solid; font-size: x-large; text-decoration: none;}
body{text-align: center;}
#p1{font-size: x-large;}
#p2{color: blue;}
ol{font-size: x-large;}
#h1{color: red; font-size: xx-large;}
ul{font-size: x-large;}