How to put on a welsh accent?

i would really love to be able to do a welsh accent, just for fun coz all my friends can do accent and voices except me and i LOVE welsh accents. Have you seen a video or something which tells you how to do one or do you have any tips like how you say a certain vowel or something. I have quite a bit of welsh family but ive never really been able to do it and i can hear the accent in my head i just cant get it to come out. help?