__________ .__ .__
\______ \ ____ __ __ _____| |__ | |__
| | _// _ \| | \/ ___/ | \| | \
| | ( <_> ) | /\___ \| Y \ Y \
|______ /\____/|____//____ >___| /___| /
\/ \/ \/ \/
Never modify the Fett base theme.
Make sure Fett is correctly installed and enable this theme. That's all there is to it.