How to create multiple buttons like this?
I want to make a operation span task. I need to present multiple buttons with labels being different letters. Users will click on these buttons and the letters will appear as shown in the figure below:
I have experiences with application programming and I can make this easily using Java, C, .Net languages. However, I am new to Opensesame so I don't know what I can do with Opensesame to make what I described above. Can I make this directly with Opensesame GUI? Can I create multiple buttons in some window in Opensesame? Or do I need to manually draw everything in a sketchpad and listen events from mouse to create other effect like button click and so on?
I don't mean to ask you for a detailed way to make what I want. I just want to have some insight on which direction I need to go, which part on Opensesame manual I need to read. For example, I found that there is a page about Canvas in Opensesame. Do I need to read about Canvas?
Thank you very much.