It is colour changing however it's a square on the roof which is not what I'm looking for. I'd really like to see a version where it keeps the pattern of the paint sweeping up with the stairs but it can change to whatever colour you like. But for now I'll just use a different version of the Enviro 400

Transparent Lemon the orignal model make has the colour changing version, go and check him out. Ishikawa LM

Do you have one that has that pattern but changes with the line colour?