Alternar entre esquemas de cores no vim

let g:focuscolour = 0

function! ToggleFocusColor()
if (g:focuscolour)
colorscheme desert

let g:focuscolour = 0
else
colorscheme focus
-dark
let g:focuscolour = 1
endif

endfunc


"Set F6 to toggle
nmap <silent> <F6> :call ToggleFocusColor()<CR>