title: Skipping lines of code in Python?
body: <p>So as my first project on python I am trying to make a dichotomous key like program where it guesses what animal you are thinking of after asking questions, I'm really new to this so try to explain it kind of simple :). Also sorry if this question has been asked somewhere else, I didn't really know how to ask it.</p>
  
  <pre><code>think=input ("Think of an animal. Type ready when you want to begin")
  think=think.upper()
  #FUR
  if think=="READY" :
     fur=input ("Does it have fur?") 
  else :
     print ("I'll be waiting")
  if fur=="YES" :
     legs=input ("Does it walk on four legs?") :
  elif fur=="NO" :
     reptile=input ("Is it a reptile?")
  #REPTILE
  if reptile=="YES" :
     shell=input ("Does it have a shell?") 
  if reptile=="NO" :
     fly=input ("Can it fly?") 
  #LEGS
  if legs=="YES" :
     pet=input ("Do people own it as a pet?")
  if legs=="NO" :
     marsupial=input("Is it a marsupial?")
  </code></pre>
  
  <p>I can't get it to skip to "Do people own it as a pet" if you answer yes on legs. also, the "I'll be waiting" (else) doesn't work. Oh, and this is python 3.x btw.</p>
  
  <p>Edited for formatting</p>
  
  <p>Edit 2: Got rid of the parentheses in my comparisons :)</p>