.test1 p:first-child{color: orange;}
.test1 p:first-of-type{color: blue;}
.test1 p:last-child{color: green;}
.test1 p:last-of-type{color: purple;}

.test2 p:last-of-type{color: purple;}
.test2 p:first-child{color: orange;}
.test2 p:first-of-type{color: blue;}
.test2 p:last-child{color: green;}

.test3 p:last-child{color: green;}
.test3 p:last-of-type{color: purple;}
.test3 p:first-child{color: orange;}
.test3 p:first-of-type{color: blue;}

.test4 p:first-of-type{color: blue;}
.test4 p:last-child{color: green;}
.test4 p:last-of-type{color: purple;}
.test4 p:first-child{color: orange;}