Contour plots of the density in the cross section at the apex for five different set-ups of cold loops at three different times. From top to bottom rows: models ColdIngr, ColdI, ColdR, ColdV and ColdV2. Panels are recentred to keep a clear view of the entire cross section. A different colourscale is chosen for the ColdIngr case, better adjusted to the density profile. All panels have the same dimensions of 6.3 Mm in the x direction and 4.2 Mm in the y direction. The period of the driver is P = 171 s. Animations of these plots for the ColdI, ColdR and ColdV are available online (Movies 3, 4 and 5).