First, you have to get your object set up as a symbol and apply a tween (see previous post). You can animate on any point of the blue rectangle. For this example, I'm going to use a 48 frame animation, the middle of the tween as the point where the object goes to the left, scales down, and rotates.
Select the 24th frame. Move object left, scale down, and rotate it 90 degrees.
Then, select the 48th frame. Move the object to the right, rotate it 90 degrees, and scale it back up.
And the results...
ADDING VS. EXTENDING FRAMES IN TWEENS
You can always extend the length of your tween by rolling over the end of the last frame until it turns into a double arrow. This is good if you want to make your tween animation occur over a longer or shorter amount of time. However, if you need to add frames to the tween (instead of making a 1 second animation sequence turn into a two second animation sequence) then you first have to select the frame after the last frame in the tween.
Hold the SHIFT key down and select the desired frame you want your tween extended to.
Navigate to the toolbar, roll over INSERT, then TIMELINE, and click FRAME.
And that's how you add frames!
Go to this link to download the original file:
Enter the 4 character password on the right. Click DOWNLOAD. Wait for the time to elapse (lower right hand corner of table structure) and then download.