Light control

#!/bin/sh
save () {
        if [ $state == "b" ]; then
                echo "zone=$zone;min=$min;max=$max" > ~/.milight/$zone.bright
        elif [ $state == "e" ]; then
                echo "zone=$zone;min=$min;max=$max" > ~/.milight/$zone.temp
        else
                echo "Unexpected case expression. Exiting"
                exit 3
        fi
}

load () {
        if [ $state == "e" ]; then
                source ~/.milight/$zone.bright
        elif [ $state == "b" ]; then
                source ~/.milight/$zone.temp
        else
                echo "Unexpected case expression. Exiting"
                exit 3
        fi
}

licon () {
        /usr/local/bin/milight.py --ip 192.168.1.133 --zone $@
        save

}

#Gradually changes temperature
liset () {
        zone=$1
        state=$2
        steps=$3
        sleep=$4
        min=$5
        max=$6
        if [ $min -ge $max ]; then
                echo "Minimum must be lower than maximum. Exiting."
                exit 1
        fi
        if [ $steps -gt 0 ]; then
                licon $zone -$state $min > /dev/null
                echo "Zone:$zone Min:$min Max:$max Steps:$steps Sleep:$sleep Diff:$(($max - $min))"
                while [ $min -lt $max ]; do
                        if [ $steps -ge $(($max - $min)) ]; then
                                sleep ${sleep}s
                                licon $zone -$state $max > /dev/null
                                min=$max
                                echo "Zone:$zone Min:$min Max:$max Steps:$steps Sleep:$sleep Diff:$(($max - $min))"
                        else
                        sleep ${sleep}s
                        min=$(($min + $steps))
                        echo "Zone:$zone Min:$min Max:$max Steps:$steps Sleep:$sleep Diff:$(($max - $min))"
                        licon $zone -$state $min > /dev/null
                        fi
                done

        elif [ $steps -lt 0 ]; then
                licon $zone -$state $max > /dev/null
                echo "Zone:$zone Min:$min Max:$max Steps:$steps Sleep:$sleep Diff:$(($max - $min))"
                while [ $max -gt $min ]; do
                        if [ $steps -le $(($min - $max)) ]; then
                                sleep ${sleep}s
                                licon $zone -$state $min > /dev/null
                                max=$min
                                echo "Zone:$zone Min:$min Max:$max Steps:$steps Sleep:$sleep Diff:$(($max - $min))"
                        else
                        sleep ${sleep}s
                        max=$(($max + $steps))
                        echo "Zone:$zone Min:$min Max:$max Steps:$steps Sleep:$sleep Diff:$(($max - $min))"
                        licon $zone -$state $max > /dev/null
                        fi
                done

        else
                echo "Amount of steps cannot be 0. Exiting"
                exit 2
        fi
}

#       States: e = Temp        b = Brightness
#       Zone    State   Step    Sleep   Min     Max
#lux    4       $1      1.5     0       50
liset   4       e       -5      .5      0       100
exit 0