a snippet of code. Trying to figure out why It doens't look the way I think it should.

stackflow experiment

#test of stacks and flows.
require "stack_flow_methods.rb"
Shoes.app  do
               #this flow shows up OK
               flow :width => 300, :height => 100 do
			background coral
		 				#why don't these stacks show up in the flow I created.
                                                stack :width => "50%" do background blueviolet 
		 				end
		 				stack :width => "-50%" do background crimson 
		 				end
		end
				


end