Making a game-- falling objects

1

I very new at flash and am making a game where basically the player is a little man at the bottom of the screen and you can move left and right while things fall from the sky. Some things you want to catch by being hit by them and other things you want to avoid. I don’t know how to make objects fall randomly from the top of the screen and just go straight down… I have seen tutorials on snow and things but they float around… I would just like my objects to go straight down. If anyone can help me I would appreciate it.