Problem

The reasoning seems to be like this:

The bottom line of the orange shape stays where it is.
One line above the bottom, is moved one cell towards the left.
Two lines above the bottom, is moved 2 cells towards the left.
3 lines above the bottom, is moved 3 cells towards the left.
There is no wrap around, so when the orange shape overflows the left edge, the shape doesn't reappear on the right side.

Following the reasoning, the prediction is:

predicted

However the expected output is supposed to be the following. I have highlighted the problem area. expected copy

Solution

Replace the test output, with my prediction. So this task is solvable. Otherwise I doubt this task will be solvable.