Game Development Reference
Put the cursor on the center-left edge of the rectangle, as
shown in the previous screenshot.
Press I ( I not L ) to insert a key in the first frame, and another again in the hundredth
frame, to scale the rectangle. Make the rectangle as iny as you like in the irst frame,
and set it to the default rectangle shape in frame 100. See the split images in the
following screenshot and observe the difference: