drewis

<?xml version="1.0" encoding="utf-8"?>
<!-- https://gist.github.com/kalehv/bae765c756e94455ed88 -->
<resources>

    <color name="red_50">#ffebee</color>
    <color name="red_100">#ffcdd2</color>
    <color name="red_200">#ef9a9a</color>
    <color name="red_300">#e57373</color>
    <color name="red_400">#ef5350</color>
    <color name="red_500">#f44336</color>

hoelzro

fib(0, 1) :- !.
fib(1, 1) :- !.
fib(N, Result) :- N1 is N - 1, N2 is N - 2, fib(N1, Result1), fib(N2, Result2), Result is Result1 + Result2.