How do i create a magnetic block?

I'm currently trying to create a vent, that pulls you slowly towards it. i didn't want to use a conveyor belt. because that was the easy way to do it. i want to make a script that does the same thing like a conveyor belt. except. the part pulls you to it by a certain radius of studs. what script, would that be?

edit two : answer below me

i researched the site you gave me. but im still confused. i can get 2 lines of that script. but how do i get the player to use magnit to get to the block. get you edit your response to help me on this script?