Update.

vim/vimrc

@@ -22,6 +22,8 @@ Plugin 'tpope/vim-commentary'
 Plugin 'tpope/vim-fugitive'
 Plugin 'tpope/vim-speeddating'
 Plugin 'tpope/vim-surround'
+Plugin 'junegunn/goyo.vim'
+Plugin 'junegunn/limelight.vim'
 
 "Plugin 'Lokaltog/vim-easymotion'
 "Plugin 'PeterRincker/vim-argumentative'
@@ -64,7 +66,7 @@ set number
 set wildmode=list:longest
 set lazyredraw
 set wildmenu
-set showmatch
+set noshowmatch
 set colorcolumn=80
 set laststatus=2
 set matchtime=5
@@ -136,6 +138,7 @@ set ttimeout
 set timeoutlen=1000
 set ttimeoutlen=0
 set virtualedit=block
+set whichwrap=b,s
 
 " == line breaking ==
 set linebreak
@@ -182,6 +185,7 @@ nnoremap <leader>v <C-w>v<C-w>l
 
 nnoremap <leader>u :GundoToggle<CR>
 
+nmap <leader>w :Goyo<CR>:TogglePencil<CR>:Limelight!!<CR>
 
 " no more ex mode
 nnoremap Q <nop>
@@ -229,6 +233,16 @@ let g:airline#extensions#whitespace#enabled = 1
 let g:airline#extensions#whitespace#symbol = ''
 let g:airline#extensions#whitespace#checks = ['trailing']
 
+" == pencil ==
+let g:pencil#textwidth = 80
+let g:pencil#autoformat = 1
+let g:pencil#cursorwrap = 1
+
+" == goyo ==
+let g:goyo_width = 80
+let g:goyo_height = "90%"
+let g:goyo_linenr = 0
+
 " === functions ===
 function! DeleteTrailingWS()
      exe "normal mz"