The prompt is taken form Speaking for IELTS by Karen Kovacs.
Look at the topic card and make a mind map, you have one minute to brainstorm your ideas, you can make notes if you want and use them during your talk.
It is good if you record yourself.
Describe a festival that you enjoy.
You should say:
when the festival occurs
where it occurs
what happens during it
and explain why you enjoy the festival.