- Run Cooja as follows
       # cd <Contiki Dir>/tools/cooja
       # ant run

     - Create a new Simulation. 
       File -> New Simulation
    
     - Create a node with Alice's application
       Mote Types -> Create Mote Type -> Cooja Mote Type

     - Select the source for mote, compile and create 10 nodes.
 
     - click on node 4, then node 7