"learn css variables city skyline" im stuck at step51

Add a linear-gradient to .bb2b that uses --building-color2 from 0% to 6% and --window-color2 from 6% to 9% .

how to type this 0 to 6 code in linear gradient

oo i got the answer…
.bb2b {
width: 100%;
height: 100%;
background: linear-gradient(
var(–building-color2),
var(–building-color2) 6%,
var(–window-color2) 6%,
var(–window-color2) 9%
);
}

ima post this so that it may help someone else