The mention of light in both of these poems show how the protagonists' feel on the object in the story leaving. They are trying to hide, to not be found. Lines 28 to 29 in w<span>here have you gone and 8 to 10 in t</span><span>he taxi </span>both show how disconnected they now feel to this other person/object.
Punctuation, grammar, and spelling
Make the letter sincere i guess (i dont know this is kind of an odd question) hoped i helped a little