cringe test

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What color are the stairs?

The more of this there is, the less you see. What is it?

What goes up but never comes down?

I follow you all the time and copy your every move, but you can’t touch me or catch me. What am I?

What has many keys but can’t open a single lock?

what is black when it’s clean and white when it’s dirty?

What gets bigger when more is taken away?