title: how can I learn size of geometry for iteration in Google Earth Engine?
body: <p>I want to learn count of pixels in my rectangle bound. For example; I should see MxN size of bound.
  my codes is :
  <a href="https://code.earthengine.google.com/11cafc2e8de63293000ee2a3c2036ae4" rel="nofollow noreferrer">https://code.earthengine.google.com/11cafc2e8de63293000ee2a3c2036ae4</a></p>