[flexcoders] still having trouble assembling Flex property assignments from string calcs

[chigwell23]

testSurface.fill221.color = "#FF0000"; //works

testSurface.["fill" + fillNo].color = #FF0000 // fillNo = 221

is what I would do in another life :-) ... could someone set me on the
straight and narrow? TIA,

Mic.