Vertical flow-pattern motion upward along magnetic field lines as a function of time. The base represents the magnetogram; the field lines are traced from a small pillow box around the active region in the photosphere. The field lines are coloured with the vertical flow speed, where red is downflow and purple is upflow. The amplitude of the velocity field is scaled to ±10 km s^-1. The movie covers the time period from 83.3 to 325 min after the start.