Inspect the current project first. Make a 600 by 600 animation lasting one second at 30 fps. Add a purple circle named Ball, 100 pixels wide, centered at x 300. Animate its y position from 360 at 0 seconds to 180 at 0.5 seconds and back to 360 at 1 second. Add slight squash at the bottom. Add a pale ellipse named Shadow at x 300, y 425, 130 pixels wide and 24 pixels tall. Keep the shadow in place and narrow it while the ball is high. Use linear keyframes for this first example. Preview frames at 0, 0.5, and 1 seconds, then leave the editable project open.