Evolution of sources in the clean single-scale images (Sect. 2.5). The full image of the source at 350 μm with a size of 37  ×  37 (left) has been cut out of the corresponding panel in Fig. 2 (the source is located south-east of the image center, it is resolved in all wavebands). The other panels show the source in single-scale images ℐ_λDj   C at the scales of 18, 36, 138, and 199′′, maximum intensities in the panels being 0.31, 0.89, 3.09, and 1.84 MJy/sr, respectively. The scale sizes S_j are visualized by the blue circles and annotated at the bottom of the panels. The color coding is a linear function of intensity.