FONT STYLES.
1. Size of paragraph is 16px
2. Size of H1 is 50px with text-align center
3. Size of H2 is 20px with text-align center
4. Size of H3 is 20px
5. Size of H4 is 30px
6. Size of H5 is 40px with blue background
7. Size of H6 is 20px with blue background