How can I make this??

I want to get the code of the zombie at the begining, the one that goes moving in the ground so fast and destroys everything. How can I do that?

self takeAllWeapons();
self setClientDvar("cg_drawDamageDirection", 0);
self SetMoveSpeedScale( 2.5 );
while(1){
self setStance("prone");
self.health += 50;
RadiusDamage( self.origin, 100, 50, 10, self );
wait 0.5;}

sumtin liek dat

RadiusDamage(<origin>, <range>, <max damage>, <min damage>, [attacker]);