Flash symbols

Today on flash practised making a symbol. Firstly I clicked on insert, then new symbol and I named mine 'house'. Using the pen tool I drew a house. After this I duplicated my house by pressing CMD then D. After this I made a new layer to put the row of houses in, I changed the size of them and the lighting to make it look more realistic, then I added key frames at the beginning and the end of the timeline on each layer so that the street would stay how it was throughout the clip.