Problems with creating an experimental game on Medialab (case 15598)

[Frustratedstudent]

Hi, I am making a simple game on MediaLab and have run into some difficulties. For my game, participants have to play in 5 trials. For each trial, the participant has to make a decision on how many zebras he/she wishes to keep and how many zebras he/she wishes to release. The total of the two (Keep/Release) responses must add up to 20. After making the decision, the participant moves on to the next trial, for which he/she has to make the same decision. Firstly, how do you create two separate response boxes, one for entering the Keep number and one for entering the Release number? I tried to make do with whatever I could, by using the mask parameters for the fill in the blank option (m**-**) such that participants fill in the Keep number in the right two boxes and Release number in the left two boxes. However, if there is a simpler way I would very much appreciate it. Secondly, I would like to have the Keep scores from the previous pages summed up and presented to the participant so that he/she knows how many zebras he/she has kept up to the current trial. Only the Keep scores. This doesn't seem possible with the mask parameters method I have been using up to now.
Thank you very much.