strange results

[Fig]

I took out all of the color commands that were in the shape functions
and all of the features to the 'draw_house' function showed showed up.
I started putting the color commands back into the shape functions and
have no problems with some of them but when I put the color command
back into others, some of the features start to disappear. As far as I
can see, all of the code is right but I'm just a beginner so I am not
for sure. Can anyone tell me why this is doing what it is.