I do not want so complicated, just the yellow lines ( chromosome positions on x axis and read depth on y axis) So that I can easily see where readdepth is low (deletion) and where it is high (duplication).
If I may, I'll link to the tool we have developed. CNAnorm (I recommend the linked developer version 1.1.8). The input data is very similar, it does require control reads, but, if you want to use ReadDepth approach, you can set READ_DEPTH as "test" and a constant value for "control" (the average of READ_DEPTH?).
In this vignette you can see the output of a segmented genome, but it is also possible to visualize a "smoothed" signal and zoom to a single chromosome or to a fraction of it.
In the latest developer version 1.1.8 we added a "colorful" option to better visualize gain and loss, three extra normalisation methods ('median', 'mode' and 'closest' ) which is best for germline CNV.
further information and supproting files on our website or on the associated paper
You may also try generic genomic data visualization tools like ggbio (bioC/R package) or use glyphs from Bio::Graphics library for your task. See the extensive discussion on genomic visualization tools here.