Thanks - tried that and all it did when I got to this part below was draw a line wherever I moved my cursor but nothing else
THIRD
Now the magic part, In the tools menu Find the Colour Change Tool - - (Actually Called Recolour)
Left click on a colour you like on the colour pallet (big colourful thing on bottom left)
Now drag across the wall. If it comes out well well done.
The file you sent works better but still only has a few colours to try and no idea how to add more.
tbh, it seems an awfully complex solution to what is surely a basic requirement of a paint package, namely to draw a line vector shape and vary the colour within it. Maybe MS paint would be a better solution but havent tried that yet.
Thanks for your help anyway. Guess I'm just gonna have to go for the trusted sample paint pots on the wall approach.