Firstly , it is not nice to cast spells on others without their permission .
Wiring a spell to activate when a person reads a particular phrase , or when the caster breaks a tablet etc is fine and can be done , but you shouldn't be test running it on random people . That is definitely wrong of you to do such a thing.
Firstly , in your posts , you said that the person that is being casted on needs to belief. That is wrong. Only the caster needs to do that and combined with his skills , it can happen. However , if you tell the person who you are doing it on , it is most likely his own mind will make he or she shiver as it becomes a basic suggestion to oneself.
And i also do not see why you want to call in a Major Hindu god into this as to me , it seems like you are calling in his assistence for stupid reasons.He creates , destroys , preserves , conceals and blesses others and is regarded as one of the elements that represents the supreme god himself..and asking him for redundent and stupid things like that..I honestly do not know why you do this.