macbook air isn’t working

Hi, my MacBook Air (I don’t know when it was made) suddenly got a glitchy look to the screen. I’m not sure if it’s the inside or outside and I need it fixed asap. I’ve shut it down with buttons as the mouse won’t work, waited 20 or so minutes... it’s still the same. Nothing is visible on the display screen. I have not dropped it (unless i’ve forgotten). It was working perfectly fine this morning.The coloured vertical lines move and switch as seen in the photos below, and nothing seems to be working please help me!