Millisecond Forums

I'm realizing an experiment in which appear two images which people should identify if there are the same or not. There are eight versions of the same stimuli divided into two groups: four versions with "YES" as correct response and the other four with "NO" as correct response. I need to randomized the stimuli presentation, but taking into account the following two conditions:

1. No more than two consecutive versions of the same stimuli may appear.
2. No more than three stimuli with the same correct response (YES or NO) may appear.

Example of stimuli lists:

<item targetAlabel>
/1 = "YES"
</item>
<item targetA>
/1 = "1_1"
/2 = "1_2"
/3 = "1_3"
/4 = "1_4"
/5 = "2_1"
/6 = "2_2"
/7 = "2_3"
/8 = "2_4"
/9 = "3_1"
/10 = "3_2"
/11 = "3_3"
/12 = "3_4"
</item>

<item targetBlabel>
/1 = "NO"
</item>
<item targetB>
/1 = "1_5"
/2 = "1_6"
/3 = "1_7"
/4 = "1_8"
/5 = "2_5"
/6 = "2_6"
/7 = "2_7"
/8 = "2_8"
/9 = "3_5"
/10 = "3_6"
/11 = "3_7"
/12 = "3_8"
</item>

I think that it could be solved using a loop or a counter, but I'm not so sure about how do that with Inquisit scripts.

Thanks in advance!

Best regards, 

Naiara