Update to dotfiles

i3/scripts/mem_usage.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+used=$(free -h --si | awk '/^Mem/ {print $3}')
+total=$(free -h --si | awk '/^Mem/ {print $2}')
+
+text="${used}/${total}"
+
+echo "$text"
+echo "$text"
+
+u=$(free --si | awk '/^Mem/ {print $3}')
+t=$(free --si | awk '/^Mem/ {print $2}')
+
+u_num=${u%[A-Za-z]*}
+t_num=${t%[A-Za-z]*}
+
+pct=$(awk -v u="$u_num" -v t="$t_num" 'BEGIN {printf "%.0f", (u/t)*100}')
+
+if [ "$pct" -ge 90 ]; then
+    echo "#ffcc66"
+else
+    echo "#ffffff"
+fi