In order to draw the rows in which the sign is getting "wider", we need to create a loop, which recurs
n times. The structure of a row contains a beginning
// + middle
\\ and an end
.. In order to reuse the already created variables, we need to decrease
dots by 1 and
underscopes with 2, because we have already printed the first row, and the dots and underscopes in the upper part of the figure are decreasing.
In each following iteration the beginning and the end decrease by 1, and the middle increases by 2.