The test script I've been using. Just add a 'seq' input

vrna211 example eterna script

var vrna_fold = vrna211.cwrap( 'fold', 'number', ['string','number'] );
var vrna_space = vrna211.cwrap( 'space', 'number', ['number'] );
var vrna_free = vrna211.cwrap( 'free', 'number', ['number'] );


var struct = vrna_space( 1+seq.length );
var fe = vrna_fold( seq, struct );
outln( seq );
outln( Pointer_stringify( struct ) );
outln( fe );
vrna_free( struct );