i'll suppose 8 years would have been enough time for you to figure out how it works

but just in case you haven't ... the orange oval fills up with little orange and red bars ... the two red ones come last after the orange ones indicating that you have about 10 cm of space left from the front / rear car .... the first orange one displays when the distance to the front / rear car is less than about 1 meter ... hope this was helpful ...