Selectors Level 4: :first-of-type

This line should have a green background.

This line should have a yellow background.

This line should have a yellow background.

This line should have a green background.

This line should have a green background.

This line should have a green background.

This line should have a yellow background.

This line should have a yellow background.

This line should have a green background.

This line should have a green background.