Output of a random walk simulation with semipermeable corrals. Parameters of the simulation: lcyl = 3.8 µm, Dm = 4.6 µm2/s, ts = 0.001 s, Pbc = 0.0024, lcor = 0.25 µm. Note that marker color changes each time a corral boundary is crossed. Video recorded at 24 fps, accelerated fivefold.