Jitter Orientation Visual Integration Task (JOVI)

Hello everybody! I am trying to make a JOVI task, defined as “a field of disconnected, oriented elements”. Participants are suppose to “decide whether a subset of those elements formed a leftward- or rightward-pointing shape. Difficulty depended on the amount of orientational jitter that was added to the shape’s elements”(Silverstein et al., 2011).

Here is a picture of how it is supposed to look

I think there is a way to do it using noise stimulus, but I just cannot figure out exactly how. Any help will be appreciated.