random dot motion

Hi，
I have two problems.
In the first place, I want to know if there are others stimuli about random dot of motion. For example, rotation, radiation ( expansion, contraction ) and so on.
in the second place, I want to present random dot of motion in different position trial by trial, but random dot of motion can't be written in condition file. If I write it in timing script, all trial become one trial. I don't know what should I do.
Thanks for your time,
han

There are many ways to change some parameters trial by trial.

You can use the Info field of the conditions file
https://monkeylogic.nimh.nih.gov/docs_CreatingTask.html#ConditionsFile

or set different values to variables depending on TrialRecord.CurrentTrialNumber
https://monkeylogic.nimh.nih.gov/docs_TrialRecordStructure.html

or determine the parameters in the userloop and send them to the timing script via the User field of TrialRecord.
https://monkeylogic.nimh.nih.gov/docs_CreatingTask.html#Userloop

Thanks for your response. Happy new year! These give me a good inspiration.
As for the first question, how can I solve it?

I don't understand your first question. You can make your own stimulus adapter, if you need something else.

By using the adapter RandomDotMotion, I can present a pattern of some dots. But the problem is that these dots are squares. How can I change them to circular dots?

Please read the manual.
https://monkeylogic.nimh.nih.gov/docs_MonkeyLogicGraphicsLibrary.html