4 sentences.

WHEN YOU WALK THE STREETS YOU ALWAYS FEEL ALONE.
THE SUN DOES NOT SHINE ON YOU.
A CALM SEA IS WHAT YOU ARE LOOKING FOR.
THERE’S NOTHING YOU CAN SEE IN HERE.

These sentences are fine as they are written.  It is a bit unusual to write in only captial letters as opposed to "sentence case" as MS Word calls it.  

I disagree with Jeff's comment about needing "along" here.  In standard English the first meaning of "walk the streets" is to walk freely in a town or city.  Secondarily it can mean to work as a prostitute, but context makes this meaning clear.  Here is the entry from the OXFORD ENGLISH DICTIONARY.

Definition of walk the streets:

1) Walk freely in a town or city:
              it was not safe to walk the streets at night

2) Work as a prostitute:
             she walked the streets for a few weeks when she was desperate

http://www.oxforddictionaries.com/definition/english/walk-the-streets

4 sentences.

First of all, don't write everything in capitalization.  It means you are "shouting".

WHEN YOU WALK along [You must have this very important word!  Otherwise it means you are working on the streets!  I.E.  a hustler [male prostitute] THE STREETS,  YOU ALWAYS FEEL ALONE.
THE SUN DOES NOT SHINE ON YOU.
A CALM SEA IS WHAT YOU ARE LOOKING FOR.
THERE’S NOTHING YOU CAN SEE IN HERE.