how do you describe the use of poetic devices and identify ann example
http://www.uncp.edu/home/canada/work/markport/best/study/poetry.htm
This is an excellent webpage with explanation about how to truly READ a poem well, as well as what to look for and how to write about it.
Read especially #s 5 and 6 for what to address regarding poetic devices.
http://www.unc.edu/depts/wcweb/handouts/poetry-explication.html
This webpage is even better, although I don't want you to skip the first link above. In addition to ideas for how to really READ a poem and what to focus on in various aspects, this one also gives you examples of how to write about what you find in a poem.
What poem are you working on?