Grinder Load Test Automation

I am quite old to Grinder, but recently I am trying to automate the load
test. Now i have partially automated the same with the below command, but
since we know that Grinder works as Controller-Agent architecture, the below
command is only initiating one Agent, and I am not getting any option to
start another. 

Basically i want to use two agent to define concurrency. 

Any way out 

java -classpath %CLASSPATH% -Dgrinder.script=C:\grinder-3.11\TestScript.py
-Dgrinder.processes=4 -Dgrinder.threads=10 -Dgrinder.runs=2
-Dgrinder.useConsole=false -Dgrinder.logDirectory="log/$(date +%y%m%d)"
net.grinder.Grinder %GRINDERPATH%\grinder.properties



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