I'm developing a game in XNA(C#) and I wonder what are the best practices for having different types of pads. For example I have 2 types of pads:

• Pad that just moves left (decreasing X coordinate)
• Pad moves left and moves up and down (cos function on Y coordinate)

Later I would like to implement more pads. I know I could check type in Update method and do a proper method for updating but I think it could be done better. I have the Pads class:

class Pads
    static list of pads;
    public void draw();
    public static void drawAll(); //Iterate through list and draw each item
    public void update();
    public static void updateAll(); //Iterate through list and update each item

Should I create another class for example cosPad which would extend Pads?

I really don't have idea how to make everything logical.