How to download and setup sddm-theme-corners
Open terminal and run command
                                            git clone https://github.com/aczw/sddm-theme-corners.git
                                        
                                        git clone is used to create a copy or clone of sddm-theme-corners repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with sddm-theme-corners https://github.com/aczw/sddm-theme-corners/archive/master.zip
Or simply clone sddm-theme-corners with SSH
                                            [email protected]:aczw/sddm-theme-corners.git                                    
                                    If you have some problems with sddm-theme-corners
You may open issue on sddm-theme-corners support forum (system) here: https://github.com/aczw/sddm-theme-corners/issuesSimilar to sddm-theme-corners repositories
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