Evolution of coronal rain during the observations. Panel a: Ca II 8542 Å line at 16:40:55 UT and panel b: in the Hα at 16:40:41 UT. The logarithm of the intensity is shown in panel a to enhance the appearance of the clumps, which otherwise would not be visible due to the much larger average intensity from the disc. An animation associated with the observations is available online, where the Ca II 8542 Å intensity shown in a copper coloured table is superposed on the Hα intensity displayed in a grey coloured table.