How to display oval on Psych Toolbox Screen (PTB) screen for 50 ms for 5 times and 350 ms for 5 times in a random manner ?

How to display oval on PTB screen for 50 ms for 5 times and 350 ms for 5 times in a random manner ? The total number of times the oval stimuli shoul be presented is 10 times ( 5 times for 50ms and 5 times for 350 ms). Please help me to write this code.

[Walter Roberson]

You should probably ask the PsychToolbox discussion group, as the methods would be entirely based in functions provided by PTB, rather than in MATLAB methods.

[ANKIT MAURYA]

Ok Walter . Thanks