iam gates
the kenigsberg bridge

the graph which is going into 1 direction
to the  second one

a+b=c
d+k=l

bk = luft (free space ) to the bridge to the fast speed

the smiphore (another version )
red -
yellow
green

green - maximal weight on 2
red -just un on
weneed to play with the priority
return the one or in the main program
according the data
we are limited by 1
- the nubersovalue
but we can do
switch case
or if the go to the subroutine any nuber of the values
but
set the priority
high
set the one low