5 month old....having tantrums???? HELP PLEASE?

he thinks that's his way to get attention when you can't play sit him down and say I can't play because.......but hey in 5 minutes or so we'll play your favorite game OK? If he still crys and throws fits just says go to room and take a breath or come out when you are done and ready to play nice. Thrid would be to ask him why are you crying then explain to him so he understands why you can't play and when you will play. Plus for screaming tell him how that would feel to him if you shouting and screamed at him in a nice calm voice and get him to understand it's not OK to throw fits all the time for nothing