wacky initial code

added comment explaining code gist and first prompt
part one of wacky expression finished

added code for calculating football field area
added comments for clarification, part two

part two of blanket, field expression added.
moved code around

upon testing, the prompts did not appear as written. moved code around
to see if problem solved
realized missing piece

prompt was missing from two lines of code. code now functions as
expected.
moved code, added ending

moved field area variable back to original spot, added alert for
solution