How to Disable Car move before 3,2,1 Go ?

I mean : Car stay (3,2,1) and after the animation my car can drive
How can i write this in C# script ?

public float myTimer;
public string myTimerVisualized;
public bool carCanGo;

void Update()
{
if(!carCanGo && myTimer > 0)
{
myTimer -= Time.deltaTime;
myTimerVisualized = myTimer.ToString("F0");
if(myTimer <= 0)
{
carCanGo = true;
}
}
}