SL object on top of roof

I was thinking where to create the interactive object. I have decided to create the interactive object as shown above on top of the roof of the pub because the roof of buildings are not so significant to SL London users as the street levels front. The interactive object will show the emission of carbon dioxide before and after insulating the pub. The interactive object will have four buttons as shown. The buttons will be 1) double glazing 2) wall cavity 3) loft insulation 4) using energy efficient appliances. If you press the buttons each will show how much carbondioxide could be reduced.