how to add the curves of the 3D start size on a Particle System Scriptt

Hello, I have a problem with my script. I want to add the 3 curves the 3D start size of my particle system script. But I don’t know how to do it. Can anyone help me?

public class DripEditor : MonoBehaviour {

	void Start()
	{
		ParticleSystem ps = GetComponent<ParticleSystem>();
		var main = ps.main;

	// Emiter
		main.duration	=	2.0f;
		main.loop		=	true;
		main.startLifetime	=	2.0f;
		main.startSpeed	=	0.0f;
		main.startSize3D = true; 
	}
}