creating images that move

I’d like to create images that move across the screen and am wondering which software would be the best route to go. Specifically, I’d like to have a simple image (such as a circle or a star) start on the left side of the screen and move to the right side of the screen at various speeds. The participant’s task would be to rate how fast the image moved. The images would vary in size, color, shape … some would appear with different tones as well. Thank you.

The best approach would to put the sequence in a movie and play it within SuperLab.

What software would you recommend I use to create the movie? Thanks.

Unfortunately I am not familiar with movie editors. If you have a colleague or know somebody that has experience with movie editors I think that would help you a great deal.