Privet.
I will try to be as short as possible:
The words: справа/вправа, влево/слевa, наверху, впереди, внизу, позади, в конце, в начале, сзади, внутри and вне (perhaps also посередине and в середине) answer the question: Где? (Perhaps some words are written wrongly but you understand which words I mean )
Which are the coresspoding words for aswering the question: Куда?
And also when we use the words вниз, низу and вверх?