Write the next sentence in the following story.

How to draw an impossible cube
Draw a skinny, vertical parallelogram with the lower left corner open; from there, draw two lines going horizontally, shown in red.
Add two connecting lines on the right side of the parallelogram.
They should form an " l ".
Add another two lines which continue from the corner of the parallelogram but pass beneath its right edge. The two lines then separate vertically, one going up and another going down to meet with the end of the " l ".