Install with a plugin manager, e.g. Plug 'elisohl-ncc/vanim'

Example configuration:

nnoremap <leader>rl :VanimRenderL<CR>
nnoremap <leader>rm :VanimRenderM<CR>
nnoremap <leader>rh :VanimRenderH<CR>
nnoremap <leader>rk :VanimRenderK<CR>
nnoremap <leader>ra :VanimRenderAll("h")<CR>
nnoremap <leader>rak :VanimRenderAll("k")<CR>