How to make CIRCOS plot of VCF file?

I have 3 VCF files, I want to make CIRCOS plot just like the following:

https://www.nature.com/articles/s41598-020-70527-8/figures/4

I try to follow the tutorial but could not understand. The genome is of Zea mays and the reference files used in making VCF files are downloaded from Ensembl plant. How I can make karyotype and config files?