Answer:
What goes up and down but never moves?
Big as a saucepan, deep as a cup, Even a river can't fill it up. What is it
A canvas full of stars.
In spring I look gay, Covered in a green array, The warmer it gets the more clothing I wear, As the cold grows, I throw away my clothes.
An artΒ-form and its colourful result.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.