Path Following Robot with two sensors, each of them detecting presence of specified R or G or B color values within 3x3 pixels around center of the sensor.
It was made in 2016, with help from users on Snap! user discussion back at the old Scratch forum - at the time no Snap! forums existed yet - when I tinkered together some JS.
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I wonder if it will be as fast as was the js version. I also wonder if checking the 3*3 pixels could be somehow hyperized, so that it would check all the 9 pixels without having to use a loop? Any idea?
Maybe convert the list into a 480 by 360 list (size of the stage) and write a check that finds the current pixel your looking for and look at the columns around the one pixel. Wait, I might find something even faster than the primitive I recommended.