i3status widget for displaying my BG mmol

bgmmol

#!/usr/bin/env bash
# 2017-11-20T09:57:46.101+0000    1511171866101    65    Flat    xDrip-DexcomG5
LINE=$(curl "https://acron-nightscout.herokuapp.com/api/v1/entries" 2> /dev/null | head -n1 )
TIME_THEN=$(echo $LINE | awk '{ print $2 }' | cut -c -10)
TIME_NOW=$(date +%s)
MMOL=$(echo $LINE | awk '{ print $3 }')
ARROW=$(echo $LINE | awk '{ print $4 }')
MINS_SINCE=$(echo "($TIME_NOW - ${TIME_THEN:-0}) / 60" | bc | xargs printf "%sm ago")
case $ARROW in
    Flat)          ARROW_SYM="\\u2192"
                   ;;
    SingleUp)      ARROW_SYM="\\u2191"
                   ;;
    SingleDown)    ARROW_SYM="\\u2193"
                   ;;
    FortyFiveUp)   ARROW_SYM="\\u2197"
                   ;;
    FortyFiveDown) ARROW_SYM="\\u2198"
                   ;;
    DoubleUp)      ARROW_SYM="\\u2191\\u2191"
                   ;;
    DoubleDown)    ARROW_SYM="\\u2193\\u2193"
                   ;;
    *)             ARROW_SYM="????"
                   ;;
esac

LEVEL=$(echo "scale=2; $MMOL.0 / 18.0" | bc)
LEVEL_NO_DEC=$(echo "$MMOL.0 / 18" | bc)

# full text
printf "$LEVEL mmol$ARROW_SYM ($MINS_SINCE)\n"

# short text
printf "$LEVEL mmol$ARROW_SYM\n"

# colour?
if [[ $LEVEL_NO_DEC -lt 4 ]]
then
    echo "#ff0000"
elif [[ $LEVEL_NO_DEC -gt 10 ]]
then
    echo "#ffff00"
fi