Ok, I have had my car for about 5 months and I have noticed that it always makes this strange noise while idling and when I press the gas the noise speeds up. Im not sure if its normal or not but I do know I dont hear it on any of my parents or brothers car

. It sound like a cringg cringg cringg cringg ( kind of like a loose nut in the engine getting tossed around) while idling. Does anyone know what it could be?