Drawing basic shapes in Flash is extremely easy. Just point, click, and drag; release when you’ve got your rectangles at the desired size. Try experimenting with it; you can overlap shapes to make the silhouettes of buildings at different heights and sizes, and where they overlap they'll join to become a single shape. Don’t worry about overlapping the edges of your canvas; in the final export, only the active area itself will be visible.
Once you’re done with that, click on the small dot in the “lock” column of Layer 1 in your layers/timeline to make sure that nothing we do on future layers affects what we’ve already done. Then click the graphic in the lower left hand corner of the layer list that looks like a small sheet of paper with a “+” sign over it; this will add a new layer, layer 2. On that layer we’ll add softly shaded windows to the buildings.
