How to make a script that if player trigger a proximityprompt the bag will attached to player's body

Sorry i am a beginner scripter i don’t know how to scripting like this, someone could help me?

example:
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Try making it into an acessory, get the script a varaible of the thing you want to put on the player the have the :Clone() it and parent it to the backpack, you will have do a bit of tweaking with the accesory to get it on the right place but you can a character as a guide