Horizontal Spring Pulled from Equilibrium?

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riseofphoenix
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Multiple-choice question with options 4A (selected and marked correct), A/2, 2A and A, followed by a solution stating the path is A to 0 to -A to 0 to A, giving a total distance of 4A.


I don't necessarily understand the explanation given to the solution.
Is it basically saying:

A (valley) --> 0 (equilibrium) --> -A (valley) --> 0 (equilibrium) --> A (valley)?
 
riseofphoenix said:
Multiple-choice quiz screenshot: block on a horizontal spring pulled from x=0 to x=A, asking total distance in one full cycle; options 4A (selected), A/2, 2A, A; solution text reads path A to 0 to -A to 0 to A gives 4A.


I don't necessarily understand the explanation given to the solution.
Is it basically saying:

A (valley) --> 0 (equilibrium) --> -A (valley) --> 0 (equilibrium) --> A (valley)?
What valley are you referring to?

The block moves horizontally.