We designed a prototype for our project in order to present in Giant Jamboree. Our aim was to constitute a medium like a hive. That’s why this hive consists of a comb. we hang a tip from the top of the comb in order to test our circuit.  This eppondorf contains our bacteria medium that repells varroa mites.with our medium it is not possible for our bacteria to escape from the hive. As our future aspect we designed a kill switch model, where our bacteria is addicted to holin.The schema in the following is drown with AutoCat and Paint.