Reducing Doubling of Files

Command:
"Bringers-Up, face about to the left/right and march forth to your places"

Those soldiers who had formed the second line for the doubling turn 180^o and return to their original places that constituted the original file.  The soldier in red who was behind the soldier in blue in the second line returns to being in front of the soldier in blue after the file is back as a single line.  Last but not least, after reducing, all in the file face the same direction as their File Leader.