better line numbering, colorcolumns

vimrc

@@ -232,9 +232,6 @@ set statusline+=%*
 " always show statusline
 set laststatus=2
 
-" set a right margin and it's colour
-set colorcolumn=80
-
 set foldmethod=manual
 
 set autoindent
@@ -259,11 +256,13 @@ set pastetoggle=<F2>
 set showmode
 
 " set custom syntax highlighting
-autocmd BufNewFile,BufRead *.html set syntax=html_custom
-autocmd BufNewFile,BufRead *.php set syntax=php_custom
-autocmd BufNewFile,BufRead *.vue set syntax=vue_custom
-autocmd BufNewFile,BufRead *.vue syntax sync fromstart
-autocmd BufNewFile,BufRead *.js set syntax=pangloss_javascript_custom
+augroup syntaxhighlighting
+  autocmd BufNewFile,BufRead *.html set syntax=html_custom
+  autocmd BufNewFile,BufRead *.php set syntax=php_custom
+  autocmd BufNewFile,BufRead *.vue set syntax=vue_custom
+  autocmd BufNewFile,BufRead *.vue syntax sync fromstart
+  autocmd BufNewFile,BufRead *.js set syntax=pangloss_javascript_custom
+augroup END
 
 " fix higlight problems such as vertical-align etc
 augroup VimCSS3Syntax
@@ -279,7 +278,17 @@ augroup coloreload
 	au BufWritePost customred256.vim so $MYVIMRC
 augroup end
 
+augroup linenumbering
+  autocmd InsertEnter * :set norelativenumber
+  autocmd InsertLeave * :set number relativenumber
+  autocmd WinEnter * :set number relativenumber
+  autocmd WinLeave * set norelativenumber
+augroup END
 
+augroup colorcolumns
+  autocmd WinEnter * set colorcolumn=80
+  autocmd WinLeave * set colorcolumn=0
+augroup END
 
 " Automatically reload .vimrc if chanaged
 augroup myvimrc
@@ -389,7 +398,9 @@ let g:UltiSnipsJumpBackwardTrigger='<c-z>'
 nnoremap <F3> :NERDTreeFocus<CR>
 nnoremap <leader>nt :NERDTreeFocus<CR>
 " allow closing if only window open is a NERDTree
-autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif
+augroup nerdtreewindow
+  autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif
+augroup END
 let NERDTreeQuitOnOpen = 1
 
 " TagBar