Both of these are great examples of continuation as well as continuity. In both pieces Picasso utilizes continuation by having most of the subjects share lines with each other or the background, basically continuing lines throughout the piece without distinguishing where the line of one thing starts and another ends. Together these pieces display continuity because even though they are so different in subject matter, they are extremely similar as far as the elements and principals that he uses in them, they are stylistically the same.

Joie De Vivire:

Artist: Pablo Picasso

Year Produced: 1946

Medium: Oil on canvas

Source: http://www.pablopicasso.org/joie-de-vivre.jsp

Guernica:

Artist: Pablo Picasso

Year Produced: 1937

Medium: Oil on canvas

Source: http://en.wikipedia.org/wiki/Guernica_%28painting%29