diff --git a/config b/config
index 2b5f4ad..3e88f31 100644
--- a/config
+++ b/config
@@ -12,10 +12,13 @@
 set $mod Mod4
 set $mod2 Mod1
 
+set $right DVI-D-0
+set $left DVI-I-1
+
 # Font for window titles. Will also be used by the bar unless a different font
 # is used in the bar {} block below. ISO 10646 = Unicode
 #font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
-font pango:DejaVu Sans Mono 10
+font pango:DejaVu Sans Mono 11
 # The font above is very space-efficient, that is, it looks good, sharp and
 # clear in small sizes. However, if you need a lot of unicode glyphs or
 # right-to-left text rendering, you should instead use pango for rendering and
@@ -27,7 +30,7 @@ floating_modifier $mod
 
 # start a terminal
 # bindsym $mod+Return exec i3-sensible-terminal
-bindsym $mod+Return exec sakura
+bindsym $mod+Return exec alacritty -e fish
 
 # keepassxc
 bindsym $mod+k exec keepmenu
@@ -40,7 +43,7 @@ bindsym $mod+$mod2+w exec --no-startup-id rofi -show window
 bindsym $mod+d exec --no-startup-id rofi -show run
 bindsym $mod+$mod2+d exec --no-startup-id rofi -show drun
 bindsym $mod+$mod2+l exec --no-startup-id systemctl suspend
-bindsym $mod+l exec --no-startup-id i3lock -c 000000
+# bindsym $mod+l exec --no-startup-id i3lock -c 000000
 # bindsym $mod+$mod2+d exec dmenu_run
 # bindsym $mod+d exec --no-startup-id i3-dmenu-desktop
 # bindsym $mod+d exec --no-startup-id xfce4-popup-whiskermenu
@@ -112,15 +115,13 @@ bindsym $mod+a focus parent
 workspace_layout tabbed
 
 # program specific workspaces
-assign [class="Steam"] number 2
+assign [class="Steam"] number 10
 #assign [class="Firefox"] 2
 #assign [class="Thunderbird"] 1
 assign [class="Pidgin"] number 2
 assign [class="Mumble"] number 2
 
 
-set $left eDP1
-set $right HDMI2
 
 # workspace to monitor mapping
 workspace 1 output $left
@@ -135,8 +136,10 @@ workspace 9 output $left
 workspace 10 output $right
 
 # workspace cycling
-bindsym $mod+Tab workspace next
-bindsym $mod+$mod2+Tab workspace prev
+# bindsym $mod+Tab workspace next
+# bindsym $mod+$mod2+Tab workspace prev
+bindsym $mod+Tab [con_mark=_prevFocus0] focus
+bindsym $mod+$mod2+Tab [con_mark=_prevFocus2] focus
 
 # switch to workspace
 bindsym $mod+1 workspace number 1
@@ -325,5 +328,6 @@ mode "num" {
 # exec_always --no-startup-id ~/.config/polybar/autoname_workspaces.py --norenumber_workspaces --icon_list_format mathematician
 exec_always --no-startup-id autoname_workspaces -i superscript
 exec_always --no-startup-id ~/.config/polybar/launch.sh
-#exec xrandr --output DVI-D-0 --auto --right-of DVI-I-1
+exec --no-startup-id ~/.config/i3/focus
+# exec xrandr --output DVI-I-1 --auto --right-of DVI-D-0
 exec picom --config ~/.config/picom.config
diff --git a/focus b/focus
new file mode 100755
index 0000000..3c56696
--- /dev/null
+++ b/focus
@@ -0,0 +1,79 @@
+#!/bin/bash
+
+# epochMillis: print the amount of millis since epoch time on the std output stream.
+epochMillis(){
+	echo $(($(date +%s%N)/1000000))
+}
+
+# queue: array holding the focused window ids in order, the most recent focus is on index 0.
+queue=( )
+queueLimit=8
+
+# pushOnQueue: insert a window id on index 0 of the queue. This function also removes the given id if was already present, the queue is an ordered set.
+# arg 1: window id to insert.
+pushOnQueue(){
+	if [ "$1" = "0x0" ]
+	then
+		return
+	fi
+	newQueue=( "$1" )
+	for i in "${queue[@]}"
+	do
+		if [ "$1" = "$i" ]
+		then
+			continue
+		fi
+		newQueue=( ${newQueue[@]:0} "$i" )
+	done
+	queue=( "${newQueue[@]:0:$queueLimit}" )
+}
+
+# markQueue: put i3 marks using the window ids stored on the queue. The windows are marked using "_prevFocusX" where X is a integer corresponding with the index of the element on the queue. The previously focused window (the most recent) is marked using "_prevFocus0". This function also cleans the queue from windows that can't be marked (e.g. windows that have been closed).
+markQueue(){
+	queueCopy=( "${queue[@]}" )
+	queue=( )
+	j=0
+	for i in "${queueCopy[@]}"
+	do
+		i3-msg "unmark _prevFocus$j" 1>/dev/null 2>&1
+		if i3-msg "[id=$i] mark --add _prevFocus$j" 2>/dev/null | grep -i "\"success\":true" 1>/dev/null 2>&1
+		then
+			queue=( ${queue[@]:0} "$i" )
+			j=$(($j + 1))
+		fi
+	done
+}
+
+lastTime=$(epochMillis)
+# permanence: period in millis used to determine if a window is worthy to be saved on the queue. This enables i3 window fast navigation without saving unworthy window ids.
+permanence=1000
+
+# main loop: read activated window ids continuously.
+xprop -root -spy _NET_ACTIVE_WINDOW |
+while read line
+do
+
+	currentTime=$(epochMillis)
+	period=$(($currentTime-$lastTime))
+	lastTime=$currentTime
+
+	# previousFocus: window id of the previously focused (activated) window.
+	previousFocus=$currentFocus
+	# currentFocus: window id of the window that has just being activated.
+	currentFocus=$(echo "$line" | awk -F' ' '{printf $NF}')
+
+	# push the previousFocus id to the queue if the time spent on the previous window was greater than permanence. Check also to allow fast switching between two windows.
+	if [ $period -gt $permanence -o "$currentFocus" = "${queue[0]}" ]
+	then
+		pushOnQueue "$previousFocus"
+	fi
+
+	# if the currentFocus is marked as the previous window (_prevFocus0 or queue[0]) then swap the first two elements on the queue to allow switching.
+	if [ "${queue[0]}" = "$currentFocus" ]
+	then
+		queue=( ${queue[1]} ${queue[0]} ${queue[@]:2} )
+	fi
+
+	markQueue
+
+done
diff --git a/sequence.default b/sequence.default
new file mode 100644
index 0000000..20ebf12
--- /dev/null
+++ b/sequence.default
@@ -0,0 +1 @@
+]4;0;rgb:0000/0000/0000\]4;1;rgb:cdcd/0000/0000\]4;2;rgb:0000/cdcd/0000\]4;3;rgb:cdcd/cdcd/0000\]4;4;rgb:1e1d/9090/ffff\]4;5;rgb:cdcd/0000/cdcd\]4;6;rgb:0000/cdcd/cdcd\]4;7;rgb:e5e4/e5e4/e5e4\]4;8;rgb:4c4b/4c4b/4c4b\]4;9;rgb:ffff/0000/0000\]4;10;rgb:0000/ffff/0000\]4;11;rgb:ffff/ffff/0000\]4;12;rgb:4646/8282/b4b3\]4;13;rgb:ffff/0000/ffff\]4;14;rgb:0000/ffff/ffff\]4;15;rgb:ffff/ffff/ffff\]10;rgb:c0c0/c0c0/c0c0\]11;rgb:0000/0000/0000\]12;rgb:c0c0/c0c0/c0c0\]13;rgb:ffff/ffff/ffff\]17;rgb:c0c0/c0c0/c0c0\]19;rgb:0000/0000/0000\]4;232;rgb:0808/0808/0808\]4;256;rgb:c0c0/c0c0/c0c0\]708;rgb:ffff/ffff/ffff\
diff --git a/sequence.solarized b/sequence.solarized
new file mode 100644
index 0000000..97253d3
--- /dev/null
+++ b/sequence.solarized
@@ -0,0 +1 @@
+]4;0;#073642\]4;1;#dc322f\]4;2;#859900\]4;3;#b58900\]4;4;#268bd2\]4;5;#CB4B16\]4;6;#2aa198\]4;7;#eee8d5\]4;8;#6c7c80\]4;9;#dc322f\]4;10;#859900\]4;11;#b58900\]4;12;#268bd2\]4;13;#CB4B16\]4;14;#2aa198\]4;15;#eee8d5\]10;#839496\]11;#002B36\]12;#dc322f\]13;#839496\]17;#839496\]19;#073642\]4;232;#073642\]4;256;#839496\]708;#073642\