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<DIV><FONT face=Arial size=2>Hi</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'm trying to show a stimulus for a very short
period of time, but it doesn't work too good.</FONT></DIV>
<DIV><FONT face=Arial size=2>I have the following script (both dotCnvs and
stimCnvs are already drawn):</FONT></DIV>
<DIV><FONT face=Arial size=2>cnvs.copy dotCnvs, scrRect ,
scrRect<BR>sleep(200)<BR>'Show Stim<BR>Display.waitforverticalBlank<BR>cnvs.copy
stimCnvs, scrRect , scrRect</FONT></DIV>
<DIV><FONT face=Arial size=2>sleep(1)<BR>'Clear<BR>cnvs.clear</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>But I can still see the stimCnvs. Furthermore,
sometimes I see it and sometimes not. I guess my problem is related to
refresh-rate issues, but I don't really know much about screens. </FONT></DIV>
<DIV><FONT face=Arial size=2>So could someone explain to me what I'm doing
wrong, and more important - how can I fix it?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Yoav</DIV>
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