else if(e.getSource() == WaspButton)
{
double x = Math.random()*3200;
double y = Math.random()*1800;
for(int i=0;i<num;i++)
sim.add(new Wasp(x,y));
}
else if(e.getSource() == BeetleButton)
{
for(int i=0;i<num;i++)
sim.add(new Beetle(Math.random()*3200,