The gameplay of many great video games is defined by certain movement patterns as well as their speed and timing. For example, each of the ghosts in Pac-Man has its own and unique way of hunting the player. Another great sample for gameplay-defining movement patterns can be found in Half-Life, where a Headcrab, the simplest type of enemy, tries to attack directly from the front, while fighting Marines is harder as they are taking cover and try to flank the player.

Without the proper tools, defining such action sequences can be a very time-consuming and tedious task that often requires an experienced animator or games designer to make them seem natural and compelling. But with Panda3D and its intervals system, this won't be a problem for you after reading and working through the following recipe.