sindhri/flanker_fho

full_head_oscillation for flanker

code and packages for full head oscillation for flanker

Details in how to modify the code for another paradigm can be found the fho portion in the following document.

https://www.notion.so/jiawu/farnam-final-shared-on-DEL-6bcd9e3254924163b255dc0d6319cb9f