Optimizing for rapid presentation of several stimuli at high refresh rates

Coding
8 
board = visual.ElementArrayStim(window, 
                                fieldPos=(0.0, 0.0), fieldSize=(300, 300), 
                                fieldShape='square', nElements=9, sizes=100,
                                colors='black', 
                                colorSpace='rgb',
                                elementMask='gaussian')

This will give the error mentioned before:

AttributeError: 'ElementArrayStim' object has no attribute '_texID'

But, more important than that, I am concerned with whether this class is capable of having squares or rectangles as elements. If dot-like stimuli is the only thing that can be presented, I cannot use it to make a checkerboard.