"Tuning" and better design of a simple Website tool

Optimize Design with icons and nice images for page (3 steps formular) that i will send later. Topic is photovoltaics and its calcu-lation. Especially for second and third step. Third step is a resultpage. 1) 2nd step (visualized 3D Home for checking orientation of the roof: north south, south-west and so on. Here some Javascript that user can turn the house perspektives. Please two house type (business/industry and private simple house) 2) 2rd step (visualized result page for checking checking the pitch of the roof: 0 degree - 90 degree). 3) 3rd step (visualize resultpage) conditions: - please send .ai files (save as older ai version (Adobe illustrator) and newer) - please also use the used colors (blue, orange, grey) as on page iw will send - houses in grey white, perhaps some blue - design should be really nice and clean (it is also at the moment, but its to boring) - house perspectives: all in slope version, i will send example - all on blank background.