how can i create an ml model that predicts data for several days without input

Question

for example i give it training data x and y
but i need it to predict y without inputting x coz i dont know it

Answer 1

you need values for x, we cannot predict y from nothing

Answer 2

Really I wanna say that :
Let you question be x and answer be y.
So you got the answer it's y.

Lisa is right cuz you're trying to predict nothing out of nothing.