updated periodic example to current portal interface conventions
updated periodic example to current portal interface conventions

hanw/connectal,csail-csg/connectal,cambridgehackers/connectal,8l/connectal,8l/connectal,8l/connectal,chenm001/connectal,hanw/connectal,cambridgehackers/connectal,chenm001/connectal,hanw/connectal,csail-csg/connectal,8l/connectal,cambridgehackers/connectal,chenm001/connectal,csail-csg/connectal,csail-csg/connectal,hanw/connectal,8l/connectal,cambridgehackers/connectal,chenm001/connectal,csail-csg/connectal,cambridgehackers/connectal,chenm001/connectal,hanw/connectal