A movie from an interactive diffuser model. The model allows one to specify the size of the 2D world (yellow ring), and place any number of asters inside the world and to define their possible motion if necessary. The asters can be drawn by the user to have specific radial probabilities of trapping a particle and pulling it towards the center, or pushing it away. This is to capture the behavior of motor proteins getting trapped within an aster and walking in a particular direction along the microtubules. The world is then populated with a user defined number of particles that are free to diffuse at a specified diffusivity and get trapped by the asters. The large white dots represent the geometric center of each aster. The small cyan dots represent the diffusive particles and the lines trailing from them are the recent paths each particle has taken. If the path and particle are blue the particle is diffusing and if they are red they are traveling along a microtubule in the aster. In the begining of the movie all the (kinesins) particles are randomly placed diffusing around until the contact a microtubule causing them to walk away from the center of the aster (toward microtubule plus ends). To show the reverse behavior of walking towards, halfway through the simulation we declare that all the kinesins have turned into dyneins (obviously impossible), and they begin to walk towards the center (toward microtubule minus ends).