settings.outformat="png";
settings.render=16;

import three;

size(5cm);

draw(O -- 1.2X, arrow=Arrow3(emissive(black)));
draw(O -- 1.2Y, arrow=Arrow3(emissive(black)));
draw(O -- 1.2Z, arrow=Arrow3(emissive(black)));

draw(arc(c=O, X, X + 2Y));
draw(arc(c=O, Z, 0.5*X + Y + 0.8*Z));