is added to the first number to get to the second. 5 is then subtracted from the second number to get to the third after which 11 is added to the third to get to the fourth and 6 is subtracted from the fourth to get to the fifth. notice the alternate pattern: we add by one less number than previously added, then subtract by one more than previously subtracted.
1. the star shape switches between the left bottom corner and the other corners: in the odd frames (frames 1, 3 and 5) it is in the left bottom corner, and in the even frames (frames 2 and 4) it moves 