My `~/.xmonad/xmonad.hs` configuration file for xmonad.

xmonad.hs

import XMonad
import XMonad.Layout.Spacing
import XMonad.Layout.Gaps
import qualified Data.Map as M
import qualified XMonad.StackSet as W

myLayoutHook = gaps [(U,30), (R,30), (D,30), (L,30)] $ spacing 20 $ Tall 1 (3/100) (1/2)

myKeys conf@XConfig {XMonad.modMask = modMask} = M.fromList $ [
    ((0, 0x1008FF11), spawn "amixer set Master 2-"),
    ((0, 0x1008FF13), spawn "amixer set Master 2+"),
    ((0, 0x1008FF12), spawn "pactl set-sink-mute 0 1"),

    ((modMask, xK_u), spawn "amixer set Master 5-"),
    ((modMask, xK_i), spawn "amixer set Master 5+"),
    ((modMask, xK_o), spawn "pactl set-sink-mute 0 1"),
    ((modMask, xK_p), spawn "pactl set-sink-mute 0 0"),

    ((modMask, xK_q), spawn "xmonad --recompile; xmonad --restart"),
    ((modMask, xK_t), spawn $ XMonad.terminal conf),
    ((modMask, xK_comma), sendMessage (IncMasterN 1)),
    ((modMask, xK_period), sendMessage (IncMasterN (-1))),

    ((modMask, xK_h), sendMessage Shrink),
    ((modMask, xK_l), sendMessage Expand),

    ((modMask, xK_Return), windows W.swapMaster),

    ((modMask, xK_space), spawn "rofi -show run")
    ]

main = xmonad $ defaultConfig {
    terminal = "urxvt",
    modMask = mod4Mask,
    workspaces = ["sole"],
    layoutHook = myLayoutHook,
    startupHook = spawn "compton -c & xrdb ~/.Xresources & nitrogen --restore",
    keys = myKeys,
    borderWidth = 0
}