Drag the handles to reshape the star
Drag the outer handle to resize & spin the star; drag the inner handle to change the inner radius. A star is just vertices alternating between an outer and an inner radius.
Why know this? Placing points at evenly-spaced angles
(cos/sin around a center) is the workhorse behind a
huge amount of animation: stars, gears, sparkles, asteroids, explosion bursts,
loading spinners, radial menus. Once you can put N points on a circle at the
right angle and radius, you can build any of them — and because every vertex is
plain math, you can tween the radii, spin the angle, or morph the spike count
over time for free.