To set bundled outputs:
c = colors.combine( colors.red, colors.blue )
rs.setBundledOutput( "left", c )

c = colors.combine( c, colors.green )
rs.setBundledOutput( "left", c )

c = colors.subtract( c, colors.blue )
rs.setBundledOutput( "left", c )

To read bundled inputs:
c = rs.getBundledInput( "right" )
red = colors.test( c, colors.red )

Type "help colors" for the list of wire colors.
