Loop brightening and downflows along the loop bundle in region 3. Top: loop brightening prior to a coronal rain event. This time-distance diagram (close-up of the time range t = [5, 25] min) corresponds to path 3 in region 3 on April 1st, which is shown in Fig. B.3. We note that the intensities have been scaled to the power of 0.1 to show the large intensity variation better. Bottom: time-distance along path 2 in the same loop bundle. The dashed white lines correspond to dark and bright tracks from coronal rain.