update variable value with custom editors unity code example

Example 1: unity custom update

float StartingRate = 0.5f;
float UpdateRate = 0.3f;

void Start(){
	InvokeRepeating("CustomUpdate",StartRate, UpdateRate);
    //This will start in 0.5s and start repeating in 0.3f 
}
void CustomUpdate(){
	//Your code here
}

Example 2: unity custom editor save changes

EditorUtility.SetDirty(castedTarget);