what color is the small cube that is not metallic or green?
return cubes ;return #1 that is  small ;return #1 that is  metallic ;return #2 besides  #3 ;return #4 that is  green ;return #4 besides  #5 ;return color of #6
['select', 'filter', 'filter', 'discard', 'filter', 'discard', 'project']