question: What is the color of the other cube that's the same size as the red cube?
#1 return cubes 
#2 return #1 that  are red 
#3 return size of #2 
#4 return #1 besides #2 
#5 return sizes of #4 
#6 return #4 where #5 is  the    same as #3 
#7 return color of #6