How to persuade parents?

I have long wanted a gaming corner with monitors and PC and so I play ps4 on the TV but want to make a gaming corner due to the question is how can I persuade my parents they don't take me seriously my mum says you have a TV how can you I persuade her

Go to work and buy the equipment yourself.

A "gaming corner" doesn't even pay for itself out of the postage.

Not at all

Wait until you get older, go to work, make money and buy it yourself

There's nothing you can do about it. Parents are boss as long as you are a minor

Find a corner, buy a few things and just build your own corner.