In this task, the job is to create a new empty file called "output.txt" of size 0 bytes
and an empty directory called "docs". This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.

(out "output.txt")                     # Empty output
(call 'mkdir "docs")                   # Call external
(out "/output.txt")                     
(call 'mkdir "/docs")