#fun f/2 g/1 h/3 a/0 b/0;
#map f h .7 1:3 2:1;
// #map f h .5 1:3;
#close;
#show;
// #map f h .2;
// #close;
// #show;
#map g a .6; // testing mapping no positions
// #map g a .6 3 8; // testing position map domain/range error
#close;
#show;
