What do you think about my loophole of an idea for building almost instant credit?

Lets say i have a credit account and a savings account. I transfer $20 from my credit to my savings via online. Directly after, i have my savings account pay off the $20. I set each action to happen once every 30min. With the “pay off” happening almost spontaneously after the transfer. Would this build my credit or just cause headaches?