Building a city skyline Level 78 problem

[Ray13]

@zoitsa

When I add the :
background: repeating-linear-gradient(
var(–building-color4) 0 10%,
var(–window-color4) 10 90%
);

Hi there! Well, there are several issues:

1. No need for background property again, you’re still adding new values to it;
2. One hyphen instead of two before the variable name;
3. No percent symbols after 0 and 10

So fix it and your code will pass