Swap Displays in Ubuntu Linux

# get info from xrandr
connectedOutputs=$(xrandr | grep " connected" | sed -e "s/\([A-Z0-9]\+\) connected.*/\1/")
activeOutput=$(xrandr | grep -E " connected (primary )?[1-9]+" | sed -e "s/\([A-Z0-9]\+\) connected.*/\1/")

# initialize variables
execute="xrandr "
default="xrandr "
i=1
switch=0

for display in $connectedOutputs
do
    # build default configuration
    if [ $i -eq 1 ]
    then
        default=$default"--output $display --auto "
    else
        default=$default"--output $display --off "
    fi

    # build "switching" configuration
    if [ $switch -eq 1 ]
    then
        execute=$execute"--output $display --auto "
        switch=0
    else
        execute=$execute"--output $display --off "
    fi

    # check whether the next output should be switched on
    if [ $display = $activeOutput ]
    then
        switch=1
    fi

    i=$(( $i + 1 ))
done

# check if the default setup needs to be executed then run it
echo "Resulting Configuration:"
if [ -z "$(echo $execute | grep "auto")" ]
then
    echo "Command: $default"
    `$default`
else
    echo "Command: $execute"
    `$execute`
fi
echo -e "\n$(xrandr)"