#      name   xcoord   ycoord
node    n0     0.3      0.0  
node    n1     0.7      0.0  
node    n2     1.0      0.3  
node    n3     1.0      0.7  

#      name   node1   node2   speed   delay   cost (optional)
link    l0     n0      n1     57600    0.01
link    l1     n1      n2     57600    0.01
link    l2     n2      n3     57600    0.01
link    l3     n3      n0     57600    0.01

#       time   command

event   1.0    state l0 up
event   1.0    state l1 up
event   1.0    state l2 up
event   1.0    state l3 up

event   1.1    state l1 up
event   1.1    state l2 up
event   1.1    state l3 up
event   1.1    state l0 down

#event   1.2    state l0 up
#event   1.2    state l1 up
#event   1.2    state l2 up
#event   1.2    state l3 up
#event   1.3    state l0 up
#event   1.3    state l1 up
#event   1.3    state l2 up
#event   1.3    state l3 up
#event   1.4    state l0 up
#event   1.4    state l1 up
#event   1.4    state l2 up
#event   1.4    state l3 up