Participant 1
Initial description: Keep only the green boxes in the test input.
Final description: Keep only the green boxes in the test input. Since this isn't right I have no idea what it could be.
Participant 2
Initial description: Each of the boxes is 3x3. Make a gap on the corners of 3x3 and start the blue boxes.
Final description: Each of the boxes is 3x3. Make a gap on the corners of 3x3 and start the blue boxes.
Participant 3
Initial description: I made blue squares on the opposite sides of the green shapes
Final description: I made blue squares on the opposite sides of the green shapes