What is Pattern IV?

Hint
Solution
Part of the pattern
Figure 0
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Not part of the pattern
Figure 0 Figure 1 Figure 2 Figure 3