Active matter is ubiquitous in nature, ranging from fish school, flocking birds, to cell colonies, and to self organised cytoskeletal polymers. The active motion of individual units gives rise to large-scale, coherent dynamics of the system, termed collective behaviours. Active matter simulations can reproduce how animal herds, for example, fish school, swim together and react to predators. In this project, we seek to use simulation to design a physical apparatus to guide bacteria swimming, in an effort to separate them and use them to deliver cargos.